Not originally from
jerkcity! >.< blarg!
Originally a charcitature of a dumb sounding laugh "
hurr hurr hurr"
1.
An idiot's laugh
2. An alternate version of "duh" for use on really fucking stupid people.
3. A greeting
4. Something to say when there's nothing else to say.
5. An exclamation which basic meaning is "oh how obvious!"