soiled with dirt; foul; unclean

dirty laundry.

spreading or imparting dirt; soiling

dirty smoke.

vile; mean; sordid; contemptible

to play a dirty trick on someone.

obscene; pornographic; lewd

a dirty joke.

undesirable or unpleasant; thankless

He left the dirty work for me.

very unfortunate or regrettable

That's a dirty shame!

not fair or sportsmanlike; unscrupulous

a dirty fighter.

hostile, insulting, contemptuous, or resentful

She gave me a dirty look. He made a dirty crack about the cooking.

(of a nuclear weapon) producing a relatively large amount of radioactive fallout.

(of the weather) stormy; squally

It looks dirty to windward.

Informal . obtained through illegal or disreputable means

dirty money.

appearing as if soiled; dark-colored; dingy; murky.

Slang . using or in possession of narcotics.

Foreign Exchange . (of currency floats) manipulated, as by a central bank influencing or changing exchange rates ( opposed to clean ).

to make or become dirty.

Informal . in a mean, unscrupulous, or underhand way

to play dirty.

Informal . in a lewd manner

to talk dirty.

do (someone) dirty, Slang . to treat unfairly or reprehensibly

as by cheating or slandering.

adjective

clean , pure , spotless , sterile , moral , upright , nice

verb

clean , cleanse , purify , sterilize

adjective

bedraggled , begrimed , black , contaminated , cruddy , crummy , defiled , disarrayed , dishabille , disheveled , dreggy , dungy , dusty , filthy , foul , fouled , greasy , grimy , grubby , grungy * , icky * , lousy , messy , mucky , muddy , mung , murky , nasty , pigpen * , polluted , raunchy , scummy , scuzzy , slatternly , slimy , sloppy , slovenly , smudged , smutty , sooty , spattered , spotted , squalid , stained , straggly , sullied , undusted , unhygienic , unkempt , unlaundered , unsanitary , unsightly , unswept , untidy , unwashed , yucky * , base , blue , coarse , contemptible , despicable , immoral , impure , indecent , lewd , low , mean , off-color , ribald , risqu , salacious , scatological , scurvy , sordid , unchaste , unclean , uncleanly , vile , vulgar , below the belt * , cheating , corrupt , crooked , deceitful , double-dealing , shabby , shady , shifty , sleazy , sneaky , underhanded , unethical , unscrupulous , untruthful , soiled , barnyard , bawdy , broad , fescennine , gross , profane , scatologic , scurrilous , heavy , raging , roiled , roily , rugged , stormy , tempestuous , tumultuous , turbulent , ugly , violent , wild , abject , befouled , besmeared , daggletailed , dishonorable , disreputable , excrementitious , feculent , groveling , insanitary , loathsome , ordurous , putrid , saprogenic , stercoraceous , unsportsmanlike

verb

begrime , besoil , blacken , blotch , blur , botch , coat , contaminate , corrupt , debase , decay , defile , discolor , draggle , encrust , foul , grime , make dusty , make impure , mess up , mold , muddy , pollute , rot , smear , smirch , smoke , smudge , smutch , spatter , spoil , spot , stain , sully , sweat , taint , tar , tarnish , befoul , besmirch , black , soil , besmear , bespatter , cloud , denigrate , smut , adulterate , base , bemire , clouded , despicable , dingy , dishonest , distasteful , filthy , foggy , greasy , grimy , grubby , illicit , impure , low , messy , nasty , obscene , polluted , raunchy , sloppy , smutty , soiled , sordid , squalid , stormy , sullied , unclean , unsanitary , vile , vulgar