intransitive. ‘To laugh vehemently; to laugh convulsively’ (Johnson). Cf. checkle, v. Obsolete.

to split (also break, burst,etc.) one's sides and variants: to be convulsed with laughter; to laugh heartily or uncontrollably. Also to split a pers…

Used hyperbolically to indicate extreme feelings of amusement, embarrassment, etc.; esp. in to die with, or of laughing.

To keep from getting away; to keep fast, grasp.

to laugh till (also until) one cries: to laugh until tears run down one's face; (hyperbolically) to laugh heartily or uncontrollably.

In various figurative uses. Of excessive laughter. (Cf. side, n.1 phrases 6.)

To rupture (something) by internal force, or by pressure, a blow, etc., upon it when inflated or distended. to burst a blood vessel: to cause its…

To be convulsed with laughter. Cf. 11c.

To cause (a person, his sides) to quiver with laughter or mirth. Also of a person, to shake one's sides, to be convulsed with laughter.

Chiefly figurative. to laugh oneself sick (also silly): to laugh uncontrollably and at length.

intransitive. To move the body or limbs about while laughing; to laugh heartily or uncontrollably. Frequently with about. Cf. to fall about 2b at fall…

figurative. to laugh one's head off: to laugh heartily or uncontrollably.

transitive. To disconcert, upset, disturb; to excite; spec. (originally U.S.) to convulse with laughter. Also intransitive. colloquial.

intransitive. colloquial (chiefly British). To laugh uncontrollably; to become helpless with laughter. Frequently in to fall about laughing, to fall…

transitive (reflexive). To urinate involuntarily in one's underclothes, usually as the result of extreme fear, hilarity, or excitement; (also in…