Thang-a-lang Share definition Flag A thang-a-lang is the male genitalia, also known as the penis. I just saw Hot Liza shake her thang-a-lang at the club last week. Thang-a-lang by fattyMagik June 23, 2009 0 0 Get merch Get the Thang-a-lang mug. Buy Now — $32.95 See more merch