Short way of saying "before"
Get out my face fo' i whoop yo ass!
by Pizzlej March 19, 2019
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The acronym for a person who is Full of Shit. When someone is constantly telling outrageous lies, typically about themself, in order to impress others.
"Did you hear that FOS was offered a full scholarship to Harvard, but turned it down to be a UPS driver?"
by Quinn Littles May 14, 2009
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Abbreviation and slang for North Fort Myers, the white trash part of the Fort Myers/Cape Coral, FL area. Home of Suncoast Village aka Scumcoast Village, the largest trailer park in the nation.
Person A: "Where do we got to go to pick up these bitches?"
Person B: "No Fo baby!"
Person A: "No Fo?! Man, you got us on the way to pick up some trailer trash crackheads!"
by John Boy28 January 14, 2009
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(1) meaning "for"

(2) meaning "fool" in some dialects (see stupid ass)
(1)What was that fo'?

(2)Fo' if i catch you in my part of town i will cap your ass.
by Ty Chapman May 5, 2005
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An abbreviation, meaning "fuckable-on-site". Used to classify extremely sexy people who arouse others to an immediate, uncontrollable frenzy.
Jared Leto (of 30stm) - inherently FOS. No question.
by _Jules_ December 17, 2008
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