lbts Share definition Flag the way to refer to lower back tramp stamps so that unsuspecting female lower back tramp stamp types don't know your making fun of them. That lbts is the worst fucking thing i have ever seen, but i bet she puts out. lbts by thatdamngoat July 7, 2006 0 0 Get merch Get the lbts mug. Buy Now — $32.95 See more merch