up to no good


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up to no good

Engaging in malicious or nefarious behavior. I'm worried that my daughter's boyfriend is up to no good—he always seems to be involved in some bizarre scheme. What are you boys whispering about? You're up to no good, aren't you?
See also: good, up

up to no good

Fig. doing something bad. I could tell from the look on Tom's face that he was up to no good. There are three boys in the front yard. I don't know what they are doing, but I think they are up to no good.
See also: good, up

up to no good

doing something bad In movies or on television, a man who pulls out a cigar is up to no good.
See also: good, up