Top Definition
The food particules, skin flakes, and dust that accumulates in the crevices between your keys on your keyboard and rots. Later, you can collect your keyboard smegma and use for sprinklings on cupcakes that will be given to your worst enemy.
Jim: I hate Rob so much. I need to repay him for the misdeeds he's done.

Larry: Hey, I got an idea?

Jim: What?

Larry: Let's bake up some cupcakes, top them off with keyboard smegma, and give 'em to him. He'll enjoy the rich, dense texture of the cake and crunch away on the bits of smegma. Stupid bastard!

Jim: Good idea Larry! That'll teach that SOB.
by McPhatty May 10, 2006

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