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1. FOS
Abbrev. Full of shit.
by Targen Dec 2, 2002 add a video
2. FOS
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.
3. FOS
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?"
4. FOS
Full of shit
Never trust a used-car salesman, they're all FOS.
5. FOS
freedom of speech
The man is FOS (original meaning) ... he does not deserve the FOS.
6. FOS
Fortress of Solitude
When the freak from down the street came over for dinner, I retreated to my FOS.
7. FOS
Father over shoulder.
Stop the cybering! FOS!
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