tart

dry, soured, unsweetened

pungent, sharp, tangy, zestful, zesty, zingy

astringent, puckery

hyperacid

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