crack up

Primary Meanings of crack up

1.
v
laugh unrestrainedly
2.
v
suffer a nervous breakdown
3.
v
rhapsodize about
Full Definitions of crack up
1

v laugh unrestrainedly

Synonyms:
break up
Type of:
express joy, express mirth, laugh
produce laughter
2

v suffer a nervous breakdown

Synonyms:
break up, collapse, crack, crock up
Type of:
get, have, suffer, sustain
undergo (as of injuries and illnesses)
3

v rhapsodize about

Type of:
exalt, extol, glorify, laud, proclaim
praise, glorify, or honor

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