tramp stamp

noun2

1. •
   (slang, offensive) A tattoo on a woman's lower back, stereotypically said to label her as promiscuous.

   • That's a text book definition of low-rent hoochie mama if I ever saw it. Guarantee you she's got her tramp stamp across her hips. — 2005
2. •
   (slang, offensive) A hickey on a woman.