Typically known as a line used before The Joker slashes a victims face to make it look like they are smiling but has also come to be known as a common day phrase said to one who's got a stick up their arse.

It should be noted that this disfigurement is a common day occurance in Glasgow, Scotland. Can be seen on actor Tommy Flanagan though there are far worse examples. Known as a Glaswegian smile.
Friend: Mate, you have no idea what you're on about, Sara is way hotter than Nicole.
You: I respectfully disagree.
Friend: Fuck you mate, you deserve an asswhooping for that opinion, fuck off I can't even look at you.
You:y so srs?
by MrWoggles January 21, 2009
Top Definition
"Why so serious?"

Smile more.

Made famous by Heath Ledger as The Joker in the recent film, "The Dark Knight."
"I'm dying, my ex-girlfriend gave me the AIDS."

"ysosrs? :D"
by Jakuro August 12, 2008
1. stands for why so serious
2.a question used when in an awkward position when being yelled at by another
A: Aw I shit my pants.
B: Ew gross ..
A: Y so srs?
by richarddddddddddd November 24, 2008
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