creased, adj. — Green’s Dictionary of Slang

creased adj.

[crease v.; underpinned by the image of one’s body bent double with laughter or tiredness; thus ‘creasing’ at the waist]

1. exhausted, tired out.

1925		(con. WWI) Fraser & Gibbons Soldier and Sailor Words 66: Creased, To Be: Fainted. Laid out.
1953		J. Phelan Underworld 87: [E]ven they [i.e. two thugs] was near creased with the cold.
1978		S. Murray Legionnaire 64: [W]e are creased at the end of the day and need every minute of sleep we can get.

2. (UK und.) dead.

1953

J. Phelan Underworld 181: Freddy drops down stone-cold dead [...] Creased.

3. collapsing in laughter.

1984		Partridge DSUE (8th edn) 268/1: since late 1940s.
2023		Twitter 6 May 🌐 I would so love to see the out takes! Clearly had to cut when you’ve all been falling about creased with laughter!