1. crack_up - verb
· suffer a nervous breakdown
Synonym(s): crack, crock_up, break_up, collapse
Hypernym(s): suffer, sustain, have, get
2. crack_up - verb
· rhapsodize about
Hypernym(s): laud, extol, exalt, glorify, proclaim
3. crack_up - verb
· laugh unrestrainedly
Synonym(s): break_up
Hypernym(s): laugh, express_joy, express_mirth
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