We found 4 dictionaries that define the word split one's sides:

General (4 matching dictionaries)

1. split one's sides: Merriam-Webster
2. split one's sides: Oxford Learner's Dictionaries
3. split one's sides, split one's sides: Collins English Dictionary
4. split one's sides: Wiktionary

Definitions from Wiktionary (split one's sides) ▸ verb:  To laugh hysterically. ▸ Words similar to split one's sides ▸ Usage examples for split one's sides ▸ Idioms related to split one's sides ▸ Wikipedia articles (New!) ▸ Words that often appear near split one's sides ▸ Rhymes of split one's sides ▸ Invented words related to split one's sides