dirty► dirty not clean: · Look how dirty your hands are!· Take off those dirty jeans.· We were hot and dirty after working in the garden all afternoon.· Do you have any dirty clothes you need me to wash?get dirty (=become dirty): · How did the floor get so dirty?
► muddy covered in mud: · Your shoes are really muddy - take them off before you come in.· They moved slowly along the muddy footpath.· She left a trail of muddy footprints behind her.
► dusty a dusty room, piece of furniture etc is covered in dust, especially because no one has cleaned it or moved it for a long time: · The room was dark and dusty.· dusty shelves· The journal was dusty and beginning to fall apart.
► greasy something that is greasy looks dirty because it has an oily substance on it: · greasy pots and pans· Dick wiped his hands on a greasy rag.· Her long greasy hair hung down to her shoulders.
► grubby something that is grubby is fairly dirty, usually because it has been used a lot and not washed: · He blew his nose with a grubby handkerchief.· Her coat was grubby and one of the sleeves was torn.· From his back pocket Robert took out a grubby scrap of paper.
► grimy something that is grimy has a covering of dirt on its surface, especially because it has not been cleaned for a long time: · Chris was in a grimy apron, sweeping up.· The whole town was grimy from smoke and coal-dust.· It was difficult to see through the grimy windows of the cafe.
► mucky especially British, informal dirty: · Don't wear your best shoes -- you'll only get them all mucky.· The cafeteria was self-service, and guests had to carry their food on little plastic trays to mucky tables.
1dirty: 
Your hands are all mucky.