similar to derr, but more dumb. especially if you use it on msn. pretty much a noise you make if you want to sound like a doofus, or are just being a moron, or want to aggrivate your friends, or are really, REALLY, stupid.
1. stupid kid (on msn) - derh. i dunno.
other kid (on msn) - hehehehe lol
2. kid - yeah, you know that kid? he says "derh," like, all the time.
other kid (being accused of saying derh) - wtf are you talking about? no i don't, asstits.