the GNU version of the Collaborative International Dictionary of English
n. One who vituperates, or censures abusively.
The Century Dictionary and Cyclopedia
n. One who vituperates; one who censures abusively; a reprehender; a reviler.
Word Usage
"After radio-vituperator Bill Cunningham brought his bile center stage last week, the ugliness of the tirade brought a quick and straight McCain apology."