Joker's smile 

The smeared red lips resulting when one person performs cunnilingus on a woman during her time of the month. Resembles "the Joker" from Batman.

I was so drunk I didn't realize I ate her bloody snatch until the next day when I noticed I had a joker's smile in the mirror.

Joker's smile by tim's taint December 21, 2004

Joker's smile 

The result of putting a knife in someone's mouth and then slicing both of the victim's cheeks so that he'll look like the Joker(Batman's arch-nemesis), thus putting a permanent clown's smile on his face.

The Joker himself is known for doing this to his victims in the movie The Dark Knight.

If you dont stop laughing at your own stupid jokes, I'm gonna give you a Joker's smile bitch!

Joker's smile by Terminus_Est September 30, 2008

The Joker’s Smile

The joker’s smile is a sex move in which you have sex with a woman while she’s on her period. Right before you’re about to cum you pull out and nut on her face. You then take the palm of your hand and smear it to cover her entire face. You then take your dick with period blood on it and wipe it on her lips and up the cheek to resemble the joker’s makeup.

Yo! I just hooked up with a chick and did The Joker’s Smile on her! She was so surprised!

The Joker’s Smile by Rickytickyman June 14, 2023