Top Definition
Any unwanted leavings of any kind.
Are you going to eat your pizza crustings, buddy?
by Ghostington February 16, 2014
The sorority girl's term for being lazy while wearing sweats.
I'm crusting on the couch today.
by whitleann45 January 08, 2011
when you drink so much you get a alchohol crust around your mouth
wow man i must have been hammered last night, i woke up with a crusting
by trunkface January 04, 2006
When a girl grinds her crack on your leg, and dried dookie gets on your leg.
Sam and his girl were crusting hardcore last night.
by BigNate55 May 14, 2010
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