harsh or corrosive in tone; "an acerbic tone piercing otherwise flowery prose"; "a barrage of acid comments"; "her acrid remarks make her many enemies"; "bitter words"; "blistering criticism"; "caustic jokes about political assassination, talk-show hosts and medical ethics"; "a sulfurous denunciation"; "a vitriolic critique"
very fast; capable of quick response and great speed; "a hot sports car"; "a blistering pace"; "got off to a hot start"; "in hot pursuit"; "a red-hot line drive"