Extremely funny, or to laugh hard. 'That's crack up' is a complete review. 'Crack up as' is the highest comedy rating available in New Zealand.
"The wedding speech was crack up."
"We were cracking up the whole movie."
Phrases & Expressions · New Zealand slang
Crack up
See also Hard case
Origin & notes
'That's crack up as' = the highest comedy rating available.
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More phrases & expressions
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