A jeering fan near the Celtics' bench repeatedly called Davis "fat boy" and told him to lose some weight. Davis' obscene response was audible on both the Boston radio and television broadcasts of the game.
"We know what happened, and that's unacceptable," Celtics coach Doc Rivers said after the game. "It's tough when the fans are yelling that stuff at you, but you have to be stronger than that."
Davis' fine was announced Thursday by NBA executive vice president of basketball operations Stu Jackson. The incident occurred with 8:44 remaining in the second quarter of Wednesday's game.