Green’s Dictionary of Slang

1. to have sexual intercourse, to seduce.

1945		in Randolph & Legman Ozark Folksongs and Folklore (1992) I 437: Oh I honked her once and I honked her twice, / And I honked her once too often.
1997		Solar Project ‘Zeitgest’ 🎵 on ...in Time [album] We honk for cookies, we knock it out / We mash the fat, we mess around / Jig-a-jig, rub-a-dub, dead shot, Donald Duck / You wanna feel my Bethlehem steel / Mary Poppins, TNT, Bristol City / I bite into your cats and kitties.
2002		J. Ellroy ‘The D.A.’ in Destination: Morgue! (2004) 144: His dad slammed Big Bill Tilden for honking young boys.

2. (US campus) to be sexually aroused.

1975

G. Underwood ‘Razorback Sl.’ in AS L:1/2 61: honk vi Be sexually aroused, usu conspicuously so.

3. (US Und.) to kill someone.

1970		J. Anderson in N.Y. Post 14 Sept. n.p.: If brothers get mad at each other, they should go out and honk (kill) a pig (policeman) and then shake hands [HDAS].
2004		J. Ellroy ‘Hot-Prowl Rape-O’ in Destination: Morgue! (2004) 270: He honked a vice cop at the Wiltern.