look up any word, like sex:
 
2.
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"
by DION-88- March 01, 2010
1 1
 
1.
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
by DYNAMITE BOY May 31, 2009
2 1