someone that is or does something stupid. a mild insult.
"omg! did you see that joker!"

"what you lying for you joker!"

by triky July 28, 2006
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After having sex with a girl on her period, you slap your penis on each side of her cheeks next to her mouth. Thus creating a red joker face, while saying "Why so serious?".
After ejaculating far too soon and noticing the look of disgust on her face. I immediately pulled out my blood covered dick and slapped her on each side of her face, while asking "Why so serious?", And the Joker smiled.
by The Red Bulldog March 28, 2020
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A very attractive psycopath appearing in the movie "The Dark Knight". Also a less hot psycho appearing in many other movies.
Boyfriend: Who should I be for Halloween?
Girlfriend: Be Heath Ledger's Joker.
Boyfriend: Why should I be the joker?
Girlfriend: Because he's super hot.
by psithurism July 26, 2016
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When you go to the bathroom for a dump and know right away its gonna be a good one and you'll feel satisfied after. Very similar to when a hitter in baseball hits a long home run aka a no doubter
"Hey Rex hows your morning going?"
"Great man just took a no joker 20 minutes ago and am ready to take on the day"
by YourFriendJamal January 17, 2018
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The Joker is a sexual maneuver performed by a man having sex with a woman on her period. The man sticks two fingers into her pussy and then inserts his bloodied fingers into her mouth, thus giving her a bloody smile a la The Joker. When she turns around to angrily ask what he's doing, he exclaims, "WHY SO SERIOUS???"
Chris told me that he pulled off The Joker last night. That explains why his girlfriend is so upset!
by dudekakke August 29, 2008
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"duh...it's that card which you get in a pack of cards!"
"oh look.. i found a joker"
by sort November 6, 2003
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To be able to switch hacks on and off without others knowing
Used to cheat in a variety of videogames played online
Jokered Health on Socom Online
"I shot that Seal in the head five times with my AK while he was crouching, and he didn't lose any health nor die!!"
by 328_J March 25, 2007
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