bust a gut

English

Verb

bust a gut (third-person singular simple present busts a gut, present participle busting a gut, simple past and past participle busted a gut)

1. (Canada, US, slang) To work or try very hard.

   I had to really bust a gut to get it done by the deadline

2. (Canada, US, slang) To laugh very hard.

   Something about the way he said that made me just bust a gut: I practically died laughing!