Playfully malicious or mischievous: a wicked prank; a critic's wicked wit. Evil by nature and in practice: "this wicked man Hitler, the repository and embodiment of many forms of soul-destroying hatred\u201d ( Winston S. Churchill). Severe and distressing: a wicked cough; a wicked gash; wicked driving conditions. Highly offensive; obnoxious: a wicked stench. Slang Strikingly good, effective, or skillful: a wicked curve ball; a wicked imitation. Slang Used as an intensive: "a ... body suit, which she describes as wicked comfortable\u201d ( Nathan Cobb).