McDonald's Application Prank
Fill out an application from a fast food place like McDonald's and put your co-workers name and contact info on the form.Then just wait til his cell phone rings and McDonald's calls him to setup an interview.

Speak Up!
Tell the new employee that a certain someone else is hard of hearing so he better speak up everytime he talks to him. Tell that certain other person the same exact thing about the new employee. Then watch as communicate with each other in high volume every time.

The Boss Needs A Date
Before the next office party, print out a picture of your boss along with his or her phone number and post these printouts in various places throught the building. Oh and don't forget to put this underneath the picture: "I Need A Date For The Office Xmas Party...Please Call Me"

Speed Dial Changing
Change the speed dial numbers on your boss's phone so they dial strip clubs or massage parlors.

Waiting For My Document
Put a chair so it faces the printer then sit there all day long and tell people you are waiting for your document.

Waiver
Whenever someone in the office asks you to do something, ask them to sign a waiver first.

Would You Like Fries With That?
When people at the office order you to do stuff, ask them if they would like fries with that.

Pen Names
Name all of your pens and tell your co-workers that meetings cannot begin until all of your pens are present.

Pajama Day
Show up to work in your pajamas.

Fun With Business Cards
Print some new business cards for your co-worker without telling him. Only instead of his current title, change it to something else. Choose a title that is below his current title. Such as 'CFO' to 'office assistant'. Then replace his current business cards with these. You can easily do this by switching the cards in his desk card holder.