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1.
Too pissed to know whats goin on. Cant do anything without stumbling and falling over.

A sense of your mind crumbling away into nothing.
Man, im well Crumbled
by MajorFool May 24, 2007
 
2.
To shoot your load too early or to back out of a sexual act
James as if you crumbled, that girl was mint!
by Adam McGrath April 24, 2006