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FOS
or F.O.S.
abbreviation for
- free on station.
- free on steamer.
- Slang. full of shit (a euphemistic initialism used to avoid explicit vulgarity). See shit ( def 5 ).
FOS
abbreviation for
- fructooligosaccharide: a chain polymer of fructose found in a variety of plants, vegetables, and fruits and used as a sweetener
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