Performing an action with or relating to cheese. Often times the actions are decietful or could be catagorized as shenanigans.

Derived fromt he combination of "trickery" and "cheese"
some scholars beleive it could be derived from "tomfoolery" as well
If your friend smears nacho cheese on your knee you should yell, "Quit your cheesery!!"
by Max Jaeger June 16, 2004
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