Joker mouth
After performing oral sex on a menstrating woman, one generally has a ring of red across their lips or mouth. Resembling The Joker from the Batman comic book series.
I ate my girl out when she was on her period and I ended up having Joker Mouth
Joker Mouth
A name given to some with a smiliar mouth to that of 'The Joker' from the Dark Knight
Batman: "See that Gotham citizen he had a 'Joker Mouth'
Robin: "HAHA batman good one"
Robin: "HAHA batman good one"