up to no good


Also found in: Acronyms, Wikipedia.

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