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1.
An extra miniature leprechaun smoking obscene amounts of crack cocaine.
yo man check out that Fost man hes crazy.
de Brick Fost 20 janvier 2011
 
2.
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."
de bmac1 2 juillet 2009