acrid

disaffected, discontented, disgruntled, malcontent

contemptuous, cynical, disdainful, misanthropic, scornful

angry, cruel, harsh, irritated, mad, rough, savage, vehement, vicious, virulent, vitriolic

acid, caustic, cutting, mordant, sarcastic, trenchant

knock-down, drag-out (or knock-down-and-drag-out)

brisk, cross, sharp-tongued, sour, sourish, spiky (also spikey), tartish

incisive, keen, poignant, trenchant

cynical, dry, ironic (also ironical), wry

facetious, flippant, tongue-in-cheek

acrimonious, bitter, resentful, vitriolic

harsh, rough, severe, stringent

abrupt, blunt, brusque (also brusk), concise, crisp, curt, gruff, pithy, snippety, snippy, succinct, terse

backhanded, insincere