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3. up to no good

up to no good

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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