tart

[1]	prostitute , cocotte , whore , harlot , bawd , cyprian , fancy woman , working girl , sporting lady , lady of pleasure , woman of the street

adj.

[1]	sour , acidic , acidulous , acidulated , lemony , citrusy , vinegary , acetous , acescent , sharp , tangy , astringent , acerb , acerbic , acrid , bitter , pungent , piquant , harsh
[2]	biting , bitter , caustic , acid , corrosive , mordant , astringent , acrimonious , trenchant , harsh , scathing , stinging , acerbic , incisive , cutting , keen , barbed , nasty , curmudgeonly , testy , crusty , abusive , virulent , sarcastic , sardonic , satiric(al) , vicious , cynical
[3]	lemony , lemonlike , sourish , tangy
[4]	sharp , sharp-worded