dirty (adj.)
1.not appetizing in appearance, aroma, or taste
2.thickly covered with ingrained dirt or soot"a miner's begrimed face" "dingy linen" "grimy hands" "grubby little fingers" "a grungy kitchen"
3.morally offensive"an unsavory reputation" "an unsavory scandal"
4.characterized by obscenity"had a filthy mouth" "foul language" "smutty jokes"
5.unpleasantly stormy"there's dirty weather in the offing"
6.soiled or likely to soil with dirt or grime"dirty unswept sidewalks" "a child in dirty overalls" "dirty slums" "piles of dirty dishes" "put his dirty feet on the clean sheet" "wore an unclean shirt" "mining is a dirty job"
7.(of behavior or especially language) characterized by obscenity or indecency"dirty words" "a dirty old man" "dirty books and movies" "boys telling dirty jokes" "has a dirty mouth"
8.spreading pollution or contamination; especially radioactive contamination"the air near the foundry was always dirty" "a dirty bomb releases enormous amounts of long-lived radioactive fallout"
9.unethical or dishonest"dirty police officers" "a sordid political campaign"
10.violating accepted standards or rules"a dirty fighter" "used foul means to gain power" "a nasty unsporting serve" "fined for unsportsmanlike behavior"
11.expressing or revealing hostility or dislike"dirty looks"
12.obtained illegally or by improper means"dirty money" "ill-gotten gains"
13.(of a manuscript) defaced with changes"foul (or dirty) copy"
14.vile; despicable"a dirty (or lousy) trick" "a filthy traitor"
15.(of color) discolored by impurities; not bright and clear"dirty" is often used in combination"a dirty (or dingy) white" "the muddied grey of the sea" "muddy colors" "dirty-green walls" "dirty-blonde hair"
16.contaminated with infecting organisms"dirty wounds" "obliged to go into infected rooms" - Jane Austen
17.shabby and untidy"a surge of ragged scruffy children" "he was soiled and seedy and fragrant with gin" - Mark Twain
dirty (v. trans.)
1.place under suspicion or cast doubt upon"sully someone's reputation"
2.make soiled, filthy, or dirty"don't soil your clothes when you play outside!"