The word Duh is also used to show an evidence. Something that someone is stupid to not know.It is more used in french. Here is an exemple:
A: Hey, I wanted to use my two bucks to buy this, but I can't find my cash in my pocket !
B: Duh! You used it to buy a hot-dog, remember ?
a word or phrase that describes the following: idiocity, question, exclamation, and that's friggin retarded, elly!!
ELLY: the paranhas are coming, the paranhas are coming!!!
SMARTICAL PPL: DUH! elly u r such an ugly and retarded bird!!