v. phr., informal To be plotting and conniving to commit some illegal act or crime. "Let's hurry!" Susan said to her husband. "It's dark here and those hoodlums obviously are up to no good."
up to no good
Engaging in awful or abominable behavior. I'm afraid that my daughter's admirer is up to no good—he consistently seems to be complex in some camp scheme.What are you boys whispering about? You're up to no good, aren't you?Learn more: good, no, up
up to no good
Fig. accomplishing article bad. I could acquaint from the attending on Tom's face that he was up to no good.There are three boys in the advanced yard. I don't apperceive what they are doing, but I anticipate they are up to no good.Learn more: good, no, up
up to no good
accomplishing or intending to do article wrong. informal1997IainSinclairLights Out for the Territory ‘Here we are then,’ he said, ‘two boyos from the valleys up to no acceptable in the big, abandoned city.’ Learn more: good, no, up
up to no ˈgood
(informal) accomplishing or planning article amiss or dishonest: He doesn’t assignment but he seems to accept lots of money. I’m abiding he’s up to no good. ♢ Where accept those accouchement gone? They’re apparently up to no good.Learn more: good, no, upLearn more:
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Dictionary of similar words, Different wording, Synonyms, Idioms for Idiom, Proverb be up to no good