look up any word, like b4nny:
 
1.
means 'I Seriously Fucking Hate You.' used when i hate you just doesn't seem to cut it. Or when the level of hate is just so much higher.
Dude 1: dude, i needed money so i took what was there in your wallet.
Dude 2: Isfhy man.
by Abhyk September 11, 2012