Duh means "No shit sherlock" and/or "Thank you captain obvious"

means "Of course you idiot"

A word people use when the obvious is stated.

replacement for the sarcastic retort, " No Kidding! "

A male breeder, the husband of Moo. Short for "Duhddy," like "Dad" is short for "Daddy." So-called because they often have a slack-jawed, retard-like expression as they stand around in public, unable to control their rampaging crotchfruit. This expression also appears when strangers, sometimes but not always childfree, fail to properly worship the Golden Child.

Obvious, totally obvious.

Originally an insult. It is the sound that a mentally handicapped person makes. In the beginning, the word was complete with a hand gesture of smacking your wrist across your chest. Means "obviously".