Green’s Dictionary of Slang

(US) to inhale or snort a narcotic.

1968		H. Ellison ‘The Hippie-Slayer’ in Deadly Streets (1983) 107: A few were honking their cocaine.
1977		S. Kernochan Dry Hustle 33: You’re supposed to be selling that coke, not honking it.
2008		J. Niven Kill Your Friends (2009) 30: Champgne is drunk, lobsters are chomped, coke is honked.
2015		L. McInerney Glorious Heresies 345: A whole lifetime of emotion honked through in a couple of years.