Brachiosaurus HeadButt Share definition Flag When a guy is spooning with a woman in bed and poking her in the butt with his penis. I couldn't help noticing you gave me a Brachiosaurus headbutt last night. I couldn't get any sleep. Brachiosaurus HeadButt by Garretted September 6, 2020 0 0 Get merch Get the Brachiosaurus HeadButt mug. Buy Now — $32.95 See more merch