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1.
(noun) - A Facebook user's subdomain.
Dude 1: Dude, what faceslash did you grab?
Dude 2: I got facebook.com/faceslash!
Dude 1: META!
Dude 2: METAFACE!!
Dude 1: METAFACESLASH!!!
by Rollie Hatch June 24, 2009