lousy

adjectives

very bad
"a lousy play"; "it's a stinking world"
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infested with lice
"burned their lousy clothes"
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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"; "Cinderella did the dirty work while her sisters preened themselves"
vile; despicable
"a dirty (or lousy) trick"; "a filthy traitor"
is derived from