181 People Share Their Most Genius Office Pranks And Some Of Them Are Beyond Evil

One of my Co-Worker has a ton of family pictures all over his desk and walls. I was slowly changing them all to pictures of me. I worked really hard to find similar pictures to replace them. I even traveled to some of the places to replicate them. I just about had them all when another guy we worked with asked him why he had so many pictures of me. He thought this married guy had a crush on me or something.

This is only to my bosses, but when I know I'm due for a raise/promotion and they tell me they don't have budget/I need to wait a while, I start wearing suits to work. Not everyday, but maybe once a week, maybe twice, skip a few, repeat.
Looks like you're going to interviews during lunch or after work.

Made a new folder on his desktop called Russian Dwarf Porn and then took a screenshot. Set the screenshot as his desktop background.
For an engineer it took him a ridiculous amount of time before he realised why he couldn't delete the folder.

Everyday I would get into the locker room before him and place one penny in his right boot. This went on for 2 months. After about a week and a half I could see him getting frustrated. After a while it just became the norm for him to shake the penny out of his right boot everyday. He wasn't frustrated anymore, he was defeated, and just accepted it now. So, one day I decided to put it in his left boot. He came in shook his right boot out like usual, but nothing fell out. He looked so relieved, like a huge weight had been lifted. Then he put on his left boot on, and just f*ckin lost it. He slung that boot across the locker room with all his might, cussing and calling out whoever did this to him. I stopped f*cking with him after that. I plan on putting a penny in his boot once a year from now on just to remind him. Nobody knows it was me placing the penny and I plan on keeping it that way.

I have hidden a tiny speaker in an adjacent cubicle wall that emits a soft cat meow every 2 hours.

There's a guy in my office who often comes to work in jeans and a t-shirt and changes into his work clothes in his office. He's taken over half of a closet next to my cubicle with his dress clothes.
A few years ago, on March 31, I came into the office around midnight and swapped his clothes for some Hawaiian shirts, checked pants, basically a whole wardrobe of the loudest clothes I could find at a thrift store.
When I got there the next morning, he was closed up in his office. His secretary told me that he'd been having a pretty rotten week in terms of workload and was in a foul mood. Finally, he emerged wearing his jeans and t-shirt. He sort of grunted a hello at me, opened the closet door, and just stood there for probably 10-15 seconds trying to wrap his brain around what was in front of him. Finally he just started cracking up laughing, and put on one of the more "understated" outfits. He spent the rest of the day trying to figure out who had done it; meanwhile, people from all around the office came to behold my handiwork. I finally fessed up at the end of the day. He swore revenge although he still hasn't made his move.
Best April Fool's prank I'll probably ever play.

I teach elementary music. Once, I had a rivalry with the gym/PE teacher. She would send the kindergarten class to mine and tell them it was my birthday and I loved birthday hugs. She would do this about twice a month. I sent them back to her and told them she loved it when people would step on her foot. They rushed her and started stomping. She also told the kids to go into my class, say nothing, and just stare at me. It was the creepiest damn thing. She won.

I installed "cloud to butt" on my coworker's pc.
It's a Chrome addon that changes all instances of the word "cloud" being displayed to "butt".
He didn't notice for months. Last week he finally asked me what that customer could possibly mean by "uploading files to my butt".

You know how you can fray Duct tape and pull off long little sticky threads of it?
So I pulled off a single long piece of it, and put it down the side of my manager's brand new car. Looks like a deep, horrifying scratch on the paintwork.
The look on his face when we went out for a smoke. He threw his hands onto his head, his knees went weak and he basically crawled over to it, and pulled the thread of sticky duct tape off easily.
Harmless and fun, that one.

I sit beside a guy who is a good friend of mine and our desks are separated by a moveable divider. Since I moved beside him 2 weeks ago I've been moving the divider a centimetre towards him each day. We're at 13cm and he hasn't noticed yet.
I have to shift his monitors soon though so that will be interesting.

I worked on the seventh floor of an office building. Everyone in the building would try and leave on the elevators at 5 pm, every single day. The elevator would stop at EVERY single floor and when the doors would open, we would see a line up of people looking disappointed, the doors would close and we would move on. This happened even on the second floor.
when the door would open, everyone in the situation would stare at each other and be paralyzed with social anxiety about the right thing to do.
One particularly busy Friday, the doors open on the sixth floor, and I announced to the usual line up: ‘we have enough room for one of you’. One person got on, the doors closed, someone behind me chuckled, and we went on to the 5th floor. When the doors opened, I said ‘we can only take two of you’. People in the elevator moved back and squished, two people got on, and we picked up one more person per floor. By the time we got to the 2nd floor, the elevator was shoulder to shoulder, bodies touching, but for some reason, people were still listening to me. A lady next to me looked worried that I would invite more people on. The doors opened on the second floor and the people waiting looked at an extremely packed elevator. To them I said ‘take the stairs, you’re on the second f*cking floor.’
That got a good laugh.

Change their auto-correct settings in Outlook so when they type their name it adds a ridiculous title.
Example:
Tom Smith = His eloquence, master of ceremonial duck herding, and debater of microwave etiquette, Thomas "The Velvet Hammer" Smith, Esq.

Grabbed a roll of stickers from the pharmacy that say "For rectal use only" and randomly attach them to pens, phones, staplers, the water cooler.
It's all good till our director comes in and loses his shit and can't help but laugh.

I think I've mentioned this before, but I have a few co-workers (myself included) that run on post-it notes. Seriously, some of our desks look like that Pepe Silva scene in Always Sunny.
That said, I take advantage of this. I do fairly well at copying other's handwriting. I'll do my best facsimile of something innocuous or mildly ominous and place it among their other post-its.
My notable favorites were: "Ask Linda about the bees." and "Knife Parade?"

Every time this one girl mentions something her kids did, I mention something my dog did.

I whistle Christmas songs in months other than December. Just the first few lines once or twice an hour. Give it a few hours and they're questioning why jingle bells is stuck in their head mid June.

Not me, but a guy I know. He stole a coworker's novelty giant pencil, then started emailing said coworker in-character as the pencil, with photos of the pencil in different locations around Europe.
He even got another coworker in on the act to deflect suspicion away from himself, and used proxies to ensure the emails couldn't be traced back to him.
The original owner of the pencil got so pissed off, it initiated a company-wide hunt for the perpetrator. So far as I know, it was never resolved, and Pencil McPencilface roams the world to this day.

My coworkers think I have a cat. I've named him Winston.
I've pleasantly avoided many after-work happy hours and other work events with "I have to get home and feed the cat".
I even have a photo of some random cat on my phone in case anyone inquires further.
I don't have a cat, of course. But I do chuckle to myself at the thought of Winston, My Imaginary Cat.

The former big boss of my oil plant works in the office with me. I noticed anytime I would mention an interesting storey he would immidiatly fact check it and point out how wrong I was. So, If I wanted to know something , rather than look it up myself, I would just throw out a claim. Me- xyz stock is $4.40 today Him- NO ITS NOT - its $2.17
Me - Thank you

Me- Chicago is a 8 hour drive from here. Him- NO ITS NOT - its 12 if you do Route A, and 10.5 if you go Route B ect,

I made 20 copies of a paperclip and put them in the paper tray of copier. A woman in my office made a copy and got the paperclip in the pictures and thought there was a paperclip in the copy machine somewhere. She was searching and searching and even went and got a flashlight and started looking everywhere in the machine. She was opening up drawers and panels for 20 minutes. It was pretty fun to watch.