Poom per tay Share definition Flag The spelling of the sound of beatboxing (specifically a whiteboy breakbeat). "Poom per tay, poom-poom per tay, I'm gonna rap for you boy, I ain't no foo bitch, poom per tay, poom-poom per tay." Poom per tay by Jacob Brant August 1, 2005 Get the Poom per tay mug.