1 definition by Dancewiththefloor

Top Definition
Stands for "Say fucking what now?"

Derived from classic phrase "say what now?", used in situations that are a lot bigger.
Ex:

Girl: Hey, can I talk to you?
Guy: Yeah, sure what's up?
Girl: I'm pregnant. You're the father.
Guy: SFWN?
by Dancewiththefloor July 30, 2010

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