To space out. Unresponsive to questions. Starring into space while someone is talking to you.
Man, that dude was crumped out, all he said was 'huh'
by topgas March 17, 2010
1 more definition
Top Definition
To flake out on plans with your best friend.
My boy and I was gonna hang out Friday but that fucktard crumped out on me.
by Zombieeaters December 03, 2012

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