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3.
A villain of the Batman universe, first appearing in Batman #1 (1940). He is considored to be the Caped Crusader's arch nemesis. His title is the "Clown Prince of Crime".

The Joker's real name is unknown, though according to the first movie starring Nicholson, it might of been Jack Napier. The catalyst of his insanity has different tellings:

Originally a failed comedian, coerced into crime after the deaths of his wife and unborn child. Disguised as the "Red Hood", he failed to steal from Monarch Playing Cards. Running from Batman, he fell into a waste pool by the Ace Chemical Processing.

Surving the accident, it coloured his hair green, bleached his skin white and deformed his mouth into a red smile. Using eccentric weapons like acid spilling flowers and static joy-buzzers, he sadistically amuses his victims before he murders them. Other schemes include bribery and terroism.

The sidekick and former pyschiatrist of The Joker is Harley Quin (a.k.a Harleen Quinzel). She accompanies and supports her love interest in his crimes in Gotham City.
"Do I look like I'm joking?"
by Anonymous December 18, 2004
 
8.
The most Smexxii Villain of all time! Totally owns Batman and rules Gotham. An extremely hot and intellegent man.

Refrence to Heath Ledgers Joker
Boy:Wow The Joker is making Batman jizz his pants!

Girl:ha, um, ha how weird! (said Nervously)
by IdoLoveTheJoker January 24, 2010
 
9.
The Joker as used in sexual reference:

The act of removing a tampon at the string by mouth from a womans vagina while on her period. Once removed, the bloody tampon is swung back and forth by the string "while still in the teeth" as if shaking your head "no."

The blood like smile/outline from ear to ear that is left behind is know as "The Joker."
(Similar to the make-up smile on the Joker)
That girl was down for ANYTHING last night!
She even let me perform The Joker on her...
by Indetrucks February 17, 2011
 
10.
a drink created by me and my degenerate friends. it consists of 1/3 bacardi 151, 1/3 wild turkey 101 proof, and red bull. order this at a bar and depending on your weight u should be blacked out within 3 to 5 drinks.
I had one too many jokers last night that i ended up waking up next to two of the fatest girls i have ever seen in my life. the joker ruined my life
by master p 397 February 24, 2009
 
11.
A sexual act when a woman has intercourse with a man, while she is at the end of her menstrual cycle, and then the man ejaculates semen and blood on her face turning her into Heath Ledger as The Joker. The man then asks: "Why so serious?!"
"I woke up this morning with The Joker."
by Sweet Cinnamon Bunns August 01, 2012
 
12.
When a man has sex with a girl on her period, he takes his dick out and rubs it on her lips making it look like The Joker from The Dark Knight. When she gets pissed, ask her "why so serious?"
"Joe gave me The Joker last night, it was disgusting."
"HAHAHAHAHA!!!"
"Thats not funny!!"
"Why so serious?"
by timx21 January 24, 2012
 
13.
The Joker is when you fuck a girl who is on her period. You then take your bloody dick, cockslap her in the mouth and ask her "Why so serious?".
I gave my girlfriend The Joker last night during sex.
by Roam/Bumble Gums March 17, 2011
 
14.
When you apply period blood to both sides of your cheeks to make your appearance resemble that of Heath Ledger's character in the Batman series.
You can obtain the joker by using your fingers to smear on the blood or simply perform cunnilingus with vigor.
by John Hammond April 16, 2012