Dirty

make soiled, filthy, or dirty

soiled or likely to soil with dirt or grime

(of behavior or especially language) characterized by obscenity or indecency

vile

spreading pollution or contamination

contaminated with infecting organisms

(of color) discolored by impurities

(of a manuscript) defaced with changes

obtained illegally or by improper means

expressing or revealing hostility or dislike

violating accepted standards or rules

unethical or dishonest

unpleasantly stormy