keyboard cheese 

The manky stuff that builds up on keyboard letters and in the keyboard over a period of time, especially in schools/colleges where 200 odd dirty fingered teens use them each day.

Teen 1: Dude, look at this keyboard cheesizzle, bitchin
Teen 2: Man, thats ill, no diggity?

keyboard cheese by Laurie March 10, 2005

keyboard cheese 

the icky black material that always gets stuck on my mouse

what's 'keyboard cheese' made of anyway?

keyboard cheese by Foozball January 25, 2008

Cheese on my keyboard 

To have some kind of STI that affects the appearance of your genitals.

Dude 1: Man there's no way I'm getting any action tonight
Dude 2: Why not?
Dude 1: I've got cheese on my keyboard

Cheese on my keyboard by Chaoshawk April 28, 2008