1 definition by Lolitaslut

Top Definition
To burst into loud, hysterical or aggressive verbal abuse. Used primarily in Ireland and the UK. Similar with the American "freak the fuck out," however only used in negative situations.
"Yer wan at the pub cracked up at me when I asked how much she charged for an hour."

"Don't you dare crack up at me! I'm not the one sleepin' with my sister!"
#flip out #freak out #fly off the handle #loose it #loose your shit #go berserk #go ballistic #lose your temper
by Lolitaslut May 06, 2009
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