This line is probably going down in history as the most famous
and memorable quote from the new Batman movie 'The Dark Knight'.
Spoken by the late Heath Ledger as The Joker.
The tagline was also used in the production company's marketing campaign for the movie.

In every day use it can be used to tell someone to lighten up.
The Joker: 'Why so serious? Let's put a smile on that face!'
by Flinders July 19, 2008
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A quote from the Joker in The Dark Knight, turned in to an internet fad/meme. Usually used on angry, emotional people who tend to go overboard or not understand jokes.
Man: God wtf!!! I hate the world, I want it to burn!
TDK fan: Why so serious?

Troll Topic Creator: Guess what!? I like watching gay men and humping my couch!
Foolish Poster: Wow wtf!? You are fucking messed up man, get some therapy.
Troll Topic Creator: lol, why so serious!?
by ryanxwonbin July 23, 2008
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A famous quote by the Joker from The Dark Knight, the Batman movie starring Christian Bale and the deceased Heath Ledger.
Joker: Why so serious? Hey, would you like to hear how I got these scars?
by Bubba Buckalew July 23, 2008
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My father was...a drinker, and one night when he was especially crazy. My mother grabbed a kitchen knife, and daddy didn't like that. No, not at all. He took the knife, and started cutting up her face, laughing the whole time. After he's done, he looks at me and says, "Why so Serious?"
by The_Words July 21, 2008
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A very well known statement created by the hottest villain of all time.
"He sticks the blade in my mouth and..."
"Why so serious?"
by Jokette heath FOEVER July 30, 2008
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In reference to the Joker in Batman, "Why so serious?" is a phrase for somebody to use who is openly stating that they are wearing excess amounts of makeup.
by Ivana Humbalot May 7, 2011
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Originally a Batman marketing campaign, "why so serious" can be used as a response to someone taking themselves or a particular topic too personally or seriously.
-"Crunchy peanut butter is the ONLY way to go and anyone who eats creamy is a loser."
-"why so serious"
by quasidan2 July 11, 2008
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