1. dirty; filthy; foul; unclean
ちなみに靴は汚いので脱いでおく。By the way, the shoes are dirty, so I'll take them off.
2. disordered; messy; untidy; poor (e.g. handwriting)
字が汚くてごめんなさいね。I'm sorry my handwriting is messy.
3. indecent (language, etc.); dirty; vulgar; coarse
4. dastardly; mean; base; underhanded
5. stingy; greedy