We found 3 dictionaries that define the word bust one's gut:

General (2 matching dictionaries)

1. bust one's gut: Merriam-Webster
2. bust one's gut: Wiktionary

Slang (1 matching dictionary)

3. American-Australian Slang Dictionary (No longer online)

Definitions from Wiktionary (bust one's gut) ▸ verb:  Synonym of bust one's balls ▸ Words similar to bust one's gut ▸ Usage examples for bust one's gut ▸ Idioms related to bust one's gut ▸ Wikipedia articles (New!) ▸ Words that often appear near bust one's gut ▸ Rhymes of bust one's gut ▸ Invented words related to bust one's gut