A chemical combination consisting of a woman's uteral lining and blood as a result of her period accompanied by intercourse. Often described as black gummy bears in folklore.
Dude 1- Yooo dude what's that black shit all over your balls?
Dude 2- Oh yeah, that's just some left over blooterus that splattered on me after having sex with mah girl.
Dude 1- Oh word? I feel you.