a barrage of acid comments.
a sulfurous denunciation.
a vitriolic critique.
an acerbic tone piercing otherwise flowery prose.
bitter words.
blistering criticism.
caustic jokes about political assassination, talk-show hosts and medical ethics.
her acrid remarks make her many enemies.
the stifling atmosphere.
the sulfurous atmosphere preceding a thunderstorm.
the summer was sultry and oppressive.