Twat stamp 

A tattoo across a woman's pelvic bone, above the vagina or twat.
Like a tramp stamp, but in the front, above the vagina instead of the butt.

Person A: "You know that girl over there? when she has a bikini on, you can TOTALLY see her twat stamp!"
Person B: "Don't you mean tramp stamp ?"
Person A: "No, she has one in the front, too!"

Twat stamp by TheGaugeQueen April 23, 2014

Twat stamp 

A tattoo similar to a tramp stamp, but above one's vagina.

I thought I wanted to be a porn star, so I got a twat stamp in 2014. Now I get made fun of by my OBGYN.

Twat stamp by immadieanyway November 25, 2021

crimson twat stamp

The mark and/or odor that is left on an object after a nude menstruating woman has seated herself upon it.

Regular twat stamps are inherently all but invisible, but they may be easily detected by a person or animal with a keen sense of smell.

By contrast, crimson twat stamps are more distinctive, by both sight and odor.

see also: murder scene

Donnie's mattress looks like the aftermath of a Sex Pistols concert due to the excessive number of crimson twat stamps on it. One thing's for sure, he is not afraid of Aunt Flo.

crimson twat stamp by Lârry Dângüs, esq. October 24, 2008