Green’s Dictionary of Slang

(US/P.R.) a general excl. of fury, shock etc.

1936		(con. 1920s) Dos Passos Big Money in USA (1966) 924: And carried it frozenfaced to the parties in the ladies’ drawingroom ?coño.
1959		W. Brown Teen-Age Mafia 130: Corño! What do you know?
1967		P. Thomas Down These Mean Streets (1970) 5: The bad-o feeling came back. About Poppa not knowing I’d cut out from home, and Momma worrying ’cause she knew. That wasn’t fair at all. Coño, she wasn’t the one that laid that belt on my ass. [Ibid.] 32: It hurts like coño.
1975		E. Torres Carlito’s Way 47: Coño! Wait a while — what’s this?
1984		Grandmaster Melle Mel ‘Hustler’s Convention’ 🎵 Coño! Yo man you cheated me.
1995		(con. 1985–90) P. Bourjois In Search of Respect 221: Coño [expletive], I says, ‘My father love me, that’s why he’s beating me.’.
1998		T. Fontana and D. Sarjeant ‘Animal Farm’ Oz ser. 2 ep. 7 [TV script] Coño I know that dude [...] He was in El Diablos.
2000		P. Beatty Tuff 55: Coño, why you got to be so negative, Tuff?