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тут дело нечисто stresses
gen.	there is something shady about it; there's been some dirty work here; there's something amiss (Andrey Truhachev); something is wrong here (Andrey Truhachev)
idiom.	there's something fishy going on here (Andrey Truhachev); there's something fishy going on here (Andrey Truhachev); something is rotten in the state of Denmark (Andrey Truhachev)
Makarov.	there is something shady about it