A derisive and cynical laugh with particular emphasis on the 'hoo' to indicate a particularly snide and sarcastic rejoinder to a bad joke or express deliberate insensitivity towards bad news.
A ridiculous response to a ridiculous stimuli.
News Reporter on TV: "Anna Nicole's baby's paternity is being challenged..."
Viewer: "har har hoo! Who da guessed it? Guess jeans!
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The whack you get from a smack daddy.
"Hey, smack daddy, gimme some whack!"
"I got it right here!"
"Blessed be! It's the smack daddy whack!"
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