not conforming to approved standards of social or professional behavior; "unethical business practices"[ant: ethical ]

adjective

ethical , good , honest , moral , right , upright

adjective

cheating , corrupt , crooked , dirty * , dirty-dealing , dishonorable , disreputable , double-crossing , fake , fishy * , flimflam * , fly-by-night * , illegal , improper , mercenary , scam * , shady * , sharp * , slick * , slippery * , sneaky * , two-faced * , two-timing , underhand , unfair , unprincipled , unprofessional , unscrupulous , wrong , conscienceless , ruthless , unconscionable , amoral , dishonest , immoral , shady , sneaky