What is Cum Coaster?
1.
A tattoo on the lower back thought to identify a woman as sexually promiscuous. Such a tattoo is a hypothetical target for semen should a man be having unprotected sex with a partner doggy style and decide to pull out just prior to ejaculation, hence cum coaster.
See:
"I pulled out and shot my load all over that tramp's cum coaster."
See
Random Words:
1.
when u c a broad so sexc that ur dick juss pops up
oh shit check out that broad man instant boner
See boner, errection, sexc, hard..