crease
v.to laugh so hard that you cannot stop. You use this when something is extremely funny.
v.to laugh uncontrollably or to cause someone else to do so. Often used in the passive voice or with a reflexive pronoun in informal British English.
“That joke really creases me every time I hear it.”
“The entire audience started to crease when the comedian's prop accidentally fell apart on stage.”
“It is impossible to watch those old home videos without creasing, as the sheer absurdity of our childhood outfits becomes apparent to everyone in the room.”
Often used in the phrase 'crease up' or 'creasing with laughter'.
When used in the passive sense to mean 'made to laugh', it takes the preposition 'by' or 'at', not 'of'.
“There’s almost no crease in the screen, and the hinge is rock-solid.”
“The screen also still has a fairly deep crease compared to the Z Fold 8, which has almost none now.”
From earlier English creast, from Middle English crest (“ridge, crest”). More at crest.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.