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A combination of the phrase, "for sure, thanks".
ANDY: Hey man, can I borrow your Guitar Hero guitar? Got a hot date later and want to impress her by ripping off some sick riffs later.
DOUG: Yeah, sure man. I'll drop it off later.
ANDY: foshanks!
by Schlibs August 09, 2013
To agree on a certain subject or activity. Like saying "most definatly" or "for sure"
Me: Going to New York is fun!

Other Person: Foshank!!!!
by Carogray13 November 29, 2009