F.O.S.

Short for "Full Of Shitness"

A serious condition in which a person chooses a malady to be a victim of. This malady is usually vague, chronic and untreatable such as a "bad knee."

F.O.S. will tend to flare up when the person is confronted with a situation they would rather avoid.
"Is Robbie coming to your birthday party today?"

"No, she texted me yesterday. Apparently her F.O.S. is acting up, making it impossible for her to walk on her bad knee."
by mizJD January 10, 2010
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F.O.S

Hold on, Ill be F.O.S soon.
by Keep in check August 07, 2024
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tw// pallas
when sum hoes have an obsession with the best hottest and smartest twitter user @bunnnisz... usually the obsession comes from users @hippoddiamandis and @witchdiamandis bcuz they are obsessed whales
* under faez post *
a: omg this flopped as usual

b: wtf how obsessed can you be get help because u have f.o.s - faez obsessive syndrome)

*other tweet*
a: ......if this flops its faezs fault / faez hacked me
b: again you're bringing faez in... get help with ur f.o.s WHALE
by rontwigs_luvrxx August 06, 2020
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