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fuck the shit off; the last resort of the acronyms when dealing with utter plebs
pleb69: ur mom is so ghey
jeliza: ftso
by JelizaRose March 09, 2008
"Fuck The Skull Of"

An expression of hate or derision. Popular at MIT in the early 2000s, from which it spread to the internet at large. Possibly a reference to Full Metal Jacket, in which the drill instructor threatens to "gouge out your eyes and skull-fuck" a recruit.
The MPAA sued another kid for downloading mp3s. FTSO music execs
by maekern April 11, 2011