crack up

2 ENTRIES FOUND:

crack up

verb

Definition of CRACK UP

1
to declare enthusiastic approval of <that sports car isn't all it's cracked up to be>
Antonyms knock, pan, slam
2
to praise or publicize lavishly and often excessively <the movie is being cracked up as the blockbuster of the summer>
3
to show mirth with an explosive vocal sound <try not to crack up at your own punch lines—it's funnier if you keep a straight face>
Related Words grin, smile

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