FOS

1. What does FOS stand for?

Full of s***

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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."

Example

"Brandon's absolutely FOS. No way he opened a foil Charizard."

A man who is FOS

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Last Updated: March 18, 2021

2. What does FOS stand for?

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."

Example

"I was trying to explain to my online friend from Asia that "piece of cake" was just an FOS."

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Last Updated: May 4, 2018

3. What does FOS stand for?

Freedom of speech

A political acronym that means people in an area of governance or jurisdiction have the ability to speak freely.

Example

"I'm so thankful we allow FOS in our country!"

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Last Updated: May 20, 2014

4. What does FOS stand for?

Feat of strength

A gaming and chatting acronym that refers to something that requires a lot of strength and stamina.

Example

"It was quite the FOS to babysit all four of her kids last Friday night!"

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Last Updated: May 20, 2014

FOS definition

This page explains what the acronym "FOS" means. The various definitions, examples, and related terms listed above have been written and compiled by the Slangit team.

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