A plaque is what you receive when someone else feels like rewarding you for doing something well: something that ISN'T a sport...

plaque: a wooden board usually hung on a wall to commemorate something, ie. an annual fart championship winners, or remind, ie motivational saying: Tech dude shall be techy. eh?

A plaque is not very useful but still no one will throw it out.

A plaque is a film of mucus that traps bacteria on the surface of the teeth.