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The act of brushing one's anus with someone else's toothbrush then putting the toothbrush back where it was.
My roommate wouldn't quit hitting on my girlfriend so I gave his toothbrush the ol' cavity creep.
by Ehrensusedtp February 16, 2011
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2
Eww. That cavity creep tried coming on to me.
by Robert MacKenzie August 29, 2005
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