Boobner Share definition Flag A boner on your boobs; when you have inch long nipples and get a nipple hard. I forgot to wear my jock strap bra on that chilly and everybody could see my boobner. Boobner by SuperSquirter69 October 27, 2010 0 0 Get merch Get the Boobner mug. Buy Now — $32.95 See more merch