na. | 1. uproarious; double up with laughter; be convulsed with laughter; be in convulsions of laughter; be thrown into convulsions; belly laugh; burst [hold] one's sides (with laugther); laugh fit to bust; one's sides shaking [splitting] with laughter; roll about; scream with laughter; shake [split] one's sides with laughter; shake with laughter; sidesplitting |