Top Definition
The dead skin and other gunk that builds up on a computer keyboards over time.
Euuuk! shake off that keyboard plaque someware else.
by Blue Cawdrey November 18, 2004
Food particles and other small unknown particals which are between keys on the keyboard.
Person 1: OMG, is that a cornflake in your keyboard?
Person 2: My keyboard has keyboard plaque.
by Liam.1 February 20, 2008
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