to hit really hard; to get hit really hard; to be in excrutiating pain after being hit really hard.
1.O dude, I just narfed my toe on that nail! My toe is narfed.
2.(referring to a deer getting hit by a car)...Look at that deer! It just got totally narfed by that car!
3."I'm gonna narf your face!"
--that dude just got narfed.