Soutien Total et Inconditionnel aux Forces de l'Ordres.

French saying over-used by right-wing politicians to express their support to the police. The stupidity of the context in which it is often used has made it popular among French political meme pages. STIFO is the evident antonym of ACAB.
Nan mais tu vois j'étais grave ACAB parce que fuck le système tu voiiis, mais là les flics ont finalement virés les SDFs en bas de chez moi donc tu vois, STIFO en vrai
by ssttaacckkyy February 26, 2019
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Slut That I Fuck Occasionally

An acronym to be used in the place of "friend with benefits" or "fuck buddy". This is somebody that you have sex with on occasion but that you also cannot stand. She will come over, fuck you, and then leave.
"I just need to get laid, can I borrow your STIFO for the night?"

"Dude, I think I need to get myself checked. I didn't wrap it last time I was with STIFO"
by The Late J.C. February 4, 2010
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