Top Definition
Short for 'facebook wall post'. Typically said if you are inebriated. Short for 'facebook' and 'post' : fost
Guy1 "Hey.. did you see that fost from Kristina?!?!"
Guy2 "Yea.. that's wayyy too much facebook drama for me."
by bmac1 July 02, 2009

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another word for crazy awesome
That Rolling Stones concert was SO fost!
by batmanlover345 July 02, 2015

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Like fisting, but better
Fost me Daddy
by Fosting July 05, 2016

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An extra miniature leprechaun smoking obscene amounts of crack cocaine.
yo man check out that Fost man hes crazy.
by Brick Fost January 20, 2011

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