SPLIT ONE'S SIDES (N. AMER. ALSO SPLIT A GUT)
Meaning of SPLIT ONE'S SIDES (N. AMER. ALSO SPLIT A GUT) in English
split one's sides ( N. Amer. also split a gut)
informal
be convulsed with laughter.
→ split
Concise Oxford English vocab.
Сжатый оксфордский словарь английского языка.
2004