Green’s Dictionary of Slang

1. of a man, to have sexual intercourse [note nick n.² (1)].

[1633		Massinger Guardian I i: To thy mistress, boy! if I were I’thy shirt, how I could nick it!].
1748–49		Cleland Memoirs of a Woman of Pleasure (1985) 73: He nick’d at length the warm and insufficient orifice.
1771		Aristaenetus Love Epistles (translation) in Atkins Sex in Literature IV 86: Nor shall you that sly gypsy nick, / With any weapon but your — stick.
1797		Bridges Burlesque Homer (4th edn) I 223: Nor shall you that sly gypsy nick, / With any weapon but your — stick.
1939		H. Miller Tropic of Capricorn (1964) 160: Despite everything he was still nicking it off with the wife – prolonged snake-like copulations in which he would smoke a cigarette or two before un-cunting.

2. (US) to shoot.

[1895		C. Crowe Aus. Sl. Dict. 52: Nick, to hit the mark].
1924		G. Henderson Keys to Crookdom 396: Assault. Attack, sap up on, slough, mug, bust, nick, soak, clout, garrote, slug.
1929		(con. WWI) J.B. Wharton Squad 186: Got nicked—through the neck.
1951		M. Spillane One Lonely Night 58: He had gotten nicked too.