Word Grenade

Noun. Rhetorical device using adhominem character attacks against an opponent when losing an argument. Intended to frag your opponent and those standing on nearby ground on the rhetorical battlefield.

Person A is arguing a point, and is losing to person B. He insinuates that person B is a racist for believing his position even though no objective evidence is apparent to support the charge. Thus throwing a word grenade at person B.