Related Clues:

• Affront, in street slang
• Malign, slangily
• Cousin of un
• Talk smack to
• Speak ill of, a la 47-Down
• Not dat?
• Deprecate
• Hip-hop putdown
• Concert beginning?
• Prefix with 11-Down
• Bad-mouth, in street parlance
• Engage in trash talk
• Band's introduction?
• Francis and Ablonzi, to friends
• Insult, in rap