Wicked

Definition:
very

Usage:
"That kid's wicked smart." "I"m wicked drunk." "Dude, I've got a wicked bad headache."

Explanation:
It's an ancient bit of slang. Anyone have any ideas about its origins?

Trivia:
The phrase is sometimes used by buisinesses in New England, such as Pete's Wicked Ale or in Newbury Comic's slogan "A wicked good time."