split one's sides

split one's sides (laughing/with laughter) (to laugh a lot at something) — хохотать, смеяться до упаду; покатываться со смеху; умирать от смеха; живот надорвать от смеха; чуть не лопнуть от смеха

Example 1:We nearly split our sides laughing/with laughter watching Paul trying to get the dog into the bicycle basket.
Example 2:That comedian had us splitting our sides. (AmH)

Related vocabulary:
[лопнуть от смеха]
[crack up over sth]
[bust a gut] (2)
[have sb in stitches]
laugh one's head off
животики /живот(ы) надорвать