To irritate, annoy, or infuriate someone. A noun or pronoun can be used between "honk" and "off." It really honks me off when people cut in front of me on the road like that! You're going to honk off your customers even more if you don't issue some sort of official apology for the incident.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.