Headcapper Share definition Flag A vigorous drunken blowjob usually given by a cum guzzler. Most often received in a bathroom stall or the bed of a pickup truck. I met Angie at the bar last night and she gave me a real headcapper. Headcapper by tditty October 16, 2008 0 0 Get merch Get the Headcapper mug. Buy Now — $32.95 See more merch