FOS

American  

Or F.O.S.

abbreviation

1. free on station.

2. free on steamer.

3. Slang.  full of shit (a euphemistic initialism used to avoid explicit vulgarity). See shit.

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FOS British  

abbreviation

1. fructooligosaccharide: a chain polymer of fructose found in a variety of plants, vegetables, and fruits and used as a sweetener

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Example Sentences

An FOS investigator has recommended at least £115,000 should be refunded to them by Revolut, who are contesting the sum.

From BBC

Revolut told us they were unable to comment on cases that were still ongoing with the FOS but said they were “sorry to hear about any instance where our customers are targeted by ruthless and highly sophisticated criminals”.

From BBC

So far, the “Fos Era” has produced shockingly few highlights besides a feel-good offseason.

From Los Angeles Times

Mechanistically, Aiolos and Ikaros were found to directly bind and activate most members of the JUN/FOS family, transcription factors known for their essential roles in human embryo development and tissue function.

From Science Daily

Bloomberg News reported the deal valued FOS at about $40 million.

From Reuters