When this or that celebrity expresses strong disapproval of some person or policy or behavior, the tabloids constantly use the transitive verb “slam”. To slam someone is to assault them with the verbal equivalent of a right cross…right? Except when criticisms are voiced or more often tweeted, they often feel more like taunts or glares or jabs. HE “slam” substitutes: backhand, side-eye, upbraid, zing, reproach, poke, scold, diss, badmouth, stiff-arm, ding.