DISHONEST

adj. untrustworthy, underhand(ed), dishonourable, fraudulent, fake, counterfeit, deceiving, deceptive, unfair, double-dealing, thieving, thievish, knavish, cheating, deceitful, lying, untruthful, mendacious, treacherous, perfidious, corrupt, unscrupulous, unprincipled; two-faced, hypocritical; Colloq crooked, shady; Chiefly Brit slang bent He was so dishonest he stole from his mother's purse