lump your head Share definition Flag punch someone in the face if they dont be quiet, title of a hollywood undead song person 1: -rambling about dumb stuff-person 2: bro ill lump your head if u dont shut up lump your head by dickbutt369 May 15, 2019 0 0 Get merch Get the lump your head mug. Buy Now — $32.95 See more merch