A tattoo on the lower back of a female. Presence and size is directly proportional to 1) her sluttiness 2) whether or not she will swallow on the first date 3) whether she will give a male cock-rot and 4) whether or she has appeared in a gonzo-porn film will or will appear in gonzo-porn film.
Look at the size of that tramp stamp! I bet she swallows on the first date! I wouldn't go near her, though! I'd get cock-rot! With a tramp stamp like that, she must be a fluffer on a porn set!