Both words have long been subverted to mean the opposite. Together they have a double opposite-negative power to express that something is extra cool and exciting.
"You wanna go see Bowie play live?"
"Yeah, wicked and bad!"
"Wanna go out for dinner on Tuesday?"
"Yeah, I'm free. Wicked and bad - see you then."
Ruler of Lake Titicaca. Rumored to have a bunghole that gets very angry if it does not receive toilet paper. Cornholio the Great is often seen walking around with his shirt over his head and his hands in the air, chanting songs about his power, and his bunghole.
"I am Cornholio! You do not want to face the wrath of my bunghole, for I need TP!"
Butthead: Shut up, Beavis! (uh huh huh huh)
Beavis: Um, okay. (heh heh heh heh).