'fse' is a phrase used when you just witnessed a funny moment, or watched a
funny video.
It means: funniest shit
ever.
It is often used by teens online.
It is a phrase too
awkward to say in real life though.
person
1 - "HAHHAHHAHAHA I"m crying because that was so
funny! I'm dying of laughter"
person 2 - "
dude, seriously? just say fse. Because that was the fse."