FOS
Full of s***
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A man who is FOS
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Last Updated: March 18, 2021
Figure of speech
An acronym that refers to a commonly used phrase that means something other than its literal interpretation, such as "butterflies in my stomach" or "I'd give my left arm for that."
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Last Updated: May 4, 2018
Freedom of speech
A political acronym that means people in an area of governance or jurisdiction have the ability to speak freely.
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Last Updated: May 20, 2014
Feat of strength
A gaming and chatting acronym that refers to something that requires a lot of strength and stamina.
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Last Updated: May 20, 2014
Someone who thinks you're FOS thinks you're "full of s***." This acronym is used to call out people who are lying or ignorant.
S*** is a vulgar synonym for "feces." As slang, s*** is also used to mean "lies" (implying your words are comparable to s***). If someone says you're FOS, they think you are lying incessantly - either on purpose or out of ignorance.
FOS can also be used to call out exaggerations. For example, if your friend says they caught fifteen three-foot bass yesterday, you can pretty safely respond with "You're FOS."