humpty, n. — Green’s Dictionary of Slang

humpty n.

also humpty-bump, humpty-hump, humpty-dumpty

sexual intercourse.

1982		J. Sullivan ‘No Greater Love’ Only Fools and Horses [TV script] You’ve had a good time, ain’t yer – you know, a few drinks, bit of the old Humpty Dumpty and now it’s finished ain’t it, eh?
1989		J. Morton Lowspeak.

bit of humpty (n.)

a sexual willing female.

1963

K. Waterhouse Jubb (1966) 25: Get’s this black-haired bit of humpty in the bedroom.

do the humpty-bump/hump (v.) (also do the humpty dance)

(US campus) to have sexual intercourse.

1990		Eble Campus Sl. Apr. 3: do the humpty-hump – have sex.
1991		P. Blauner Slow Motion Riot 309: [I]f one of the old [‘ladies’] wanted to throw down and do the humpty dance again, he’d be happy to oblige.
1993–2003		J dizzy on Urban Dict. 🌐 humpty the humpty dance is ur chance to do the hump watch me do the humpty hump.