The masculine version of a tramp stamp; i.e. a lower back tattoo on a guy.
Dude, I was at the gym last week and I saw Jerome? Yeah, he went up to the treadmill and whipped off his shirt, and bro, I swear, he had a fag tag! No shit, it was like all tribal, and it was on his ass, dude. No, I wasn't looking at his ass. Faggot.