I believe you have answered your own question.
Also known as a Tramp Stamp or a Bullseye
Yes.
its a tramp stamp
He has a tattoo on his lower back, commonly referred to as a "tramp stamp." It may have personal significance to him or be a reflection of his style and interests. The perception of tramp stamps varies widely among individuals and may be subject to societal stereotypes.
Tramp-Stamp.
The word you're looking for is "tramp." It means to walk heavily, usually with a bit of swagger. So next time you see someone strutting down the street, you can call them a tramp and not get slapped.
Eye Opener TV - 2011 Tramp Stamp 1-22 was released on: USA: 29 November 2011
The cast of The Girl with the Tramp Stamp Tattoo - 2011 includes: Nick Corirossi Natalie Hoy Brian Huskey Joe Manganiello as Detective Jennie Pierson Linda Tan Ray Wise
a tramp stamp
The tramp stamp.
Tattoo Nightmares - 2012 Don't Call It a Tramp Stamp 1-7 was released on: USA: 27 November 2012
It's a part of the body that is visible when you wear short shirts and low slung pants. It's normally covered unless you make a conscious decision to uncover it based on fashion choices that are more provocative. Hence the name "tramp stamp" because you're wearing more provocative clothes than what the mainstream suburban Mom would wear to a PTA meeting.