or f.o.s.


free on station.
free on steamer.
Slang: Vulgar. full of shit.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for fos


abbreviation for

fructooligosaccharide: a chain polymer of fructose found in a variety of plants, vegetables, and fruits and used as a sweetener
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012