dirty

obtained illegally or by improper means

“dirty money”

discolored by impurities; not bright and clear

“a dirty (or dingy) white”

expressing or revealing hostility or dislike

“dirty looks”

characterized by obscenity or indecency

“dirty words”

unpleasantly stormy

“there's dirty weather in the offing”

defaced with changes

“foul (or dirty) copy”

violating accepted standards or rules

“a dirty fighter”

unethical or dishonest

“dirty police officers”

make soiled, filthy, or dirty

spreading pollution or contamination; especially radioactive contamination

“the air near the foundry was always dirty”

vile; despicable

“a dirty (or lousy) trick”

contaminated with infecting organisms

“dirty wounds”