H.O.H. Share definition Flag Hangover Horn. The rampant, seemingly insatiable appetite for sex that is usually associated with the hangover after a night out drinking. "I've got the H.O.H. bad. Quick! where's the hormone stick." H.O.H. by Tiffany's Toyboy August 1, 2009 0 0 Get merch Get the H.O.H. mug. Buy Now — $32.95 See more merch