"In Sutures" Humor that is so convulsively, side-splittingly hilarious, that you crack up
and fall apart
from laughing so hard, and metaphorically speaking, you require remedial surgery.
The hyperbole of being "in stitches".
Jen: That stand up gig was an absolute crack-up.
Ange: Yeh...I'm in sutures 'cos I split my sides from laughing so much.