German slang for "Fick sie hart!" (fuck her hard!)
Tim: Ich geh gleich mit Muttern n bissl was erledigen.
Struppi: FSH!
First used in german boards to motivate male to copulate female.
fsh="fick sie hart" ~ bone her
xy: tonight i got a date with a girl =)
zx: fsh gogo!
for sure. commonly used when texting
bob: you goin to the party tonight?
John: ya, fsh.
Fucking Shithead
Pronounced Fish
Person #1: Your such a fsh
Person #2: Huh?
Person #1: My point exactly.