Your ex: I love you, let's get back tgt
You: No, you are foso.
by Algorithms May 5, 2018
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Your ex: Let's get back together. I love you

You: No, you are foso.
by Algorithms May 5, 2018
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Fear of speaking out
For people who are trying to learn a second language, there is a phenomenon, FOSO, fear of speaking out.
I'm learning Chinese and I have so many ideas and thoughts that I'd like to share with others. But because of this FOSO, often times I decided to just not say anything at all.
by Ami Strong October 8, 2019
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A word young children use to call their father.
Child#1: Foso, you are amazing!
by TTG November 15, 2015
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Fear of shorting out.
That idiot shorted the GME stock, and lost all his money. I don't want to short out of my life's savings. I got FOSO.
by Troll hop January 28, 2021
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