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Derived from the acronym for "Single white female". Refers to the movie "Single White Female", where a new roommate tries to take over the Protagonist's life.

This term is used when a crazy person attempts to take over someone's life.
She did her hair and make up exactly like mine, I think shes S.W.F.ing me
by JoshyWaa9 February 02, 2010
The act of surfing sites such as youtube and the like for flash (*swf)
Heya N00b what did you do last night?
I spent a couple hours swfing on youtube
by Ricoh0102 March 14, 2007