Interjection
Disdainful indication that something is obvious.
It's hot in the desert. - Well, duh!
Indication of mock stupidity.
Duhhh, I'm Jasmine, I can't even tie my shoe laces right!
Boom, crush. Night, losers. Winning, duh. Charlie Sheen
Separate is not equal. Duh. Rachel Maddow
What are you? (Nick) Completely perplexed. You remember everything that happened. (Acheron) Yeah. Duh. Not like you're going to forget the killer zombie stalkers and psyched-out kitchen staff. What kind of freak show is this? (Nick) Sherrilyn Kenyon
Yeah, I know, but word came from Artemis herself that she wanted him here. Looks like we're having a psycho reunion this week...Oh wait, it's Mardi Gras. Duh. (Talon) Sherrilyn Kenyon
What colors are the eyes of Anubis?" "Brown... Duh. Rick Riordan
According to New York publishers, Bill Clinton will get more money for his book than Hillary Clinton got for hers. Well, duh. At least his book has some sex in it. Jay Leno