acerb, acerbic, acid, acidic, acidulous, acrid, biting, caustic, corrosive, cutting, mordant, pungent, sarcastic, sardonic, satiric(or satirical), scalding, scathing, sharp, smart-aleck, smart-alecky, smart-mouthed, snarky, tart

brisk, cross, sharp-tongued, sour, sourish, spiky(also spikey), tartishincisive, keen, poignant, trenchantcynical, dry, ironic(also ironical), wryfacetious, flippant, tongue-in-cheekacrimonious, bitter, resentful, vitriolicharsh, rough, severe, stringentabrupt, blunt, brusque(also brusk), concise, crisp, curt, gruff, pithy, snippety, snippy, succinct, tersebackhanded, insincere