| Main Entry: | crack up |
| Part of Speech: | verb |
| Definition: | break down mentally |
Synonyms: |
become demented, become psychotic, blow a fuse, collapse, come apart at seams, decline, derange, deteriorate, fail, flip out, freak out, go bonkers, go crazy, go nuts, go off deep end, go off rocker, go out of mind, go to pieces, have breakdown, schizz out, sicken |
Antonyms: |
be calm |