Definition of bust a/one's gut
informal
1
: to work or try extremely hard
We're going to have to bust our guts to finish this project on time.
2
: to laugh in an uncontrolled way
I thought I'd bust a gut (laughing) when you showed up in that silly outfit.
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What Does Your 'Gut' Tell You?
What Does Your 'Gut' Tell You?
And should you listen to it?
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“Bust a/one's gut.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/bust%20a%2Fone%27s%20gut. Accessed 6 May. 2021.
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