up to no goodINFORMAL
This page is about the conversational phrase up to no good
to be doing something bad, illegal or naughty
- "I know you've been up to no good. You won't look me in the eye."
"I haven't done anything, Mum. Honest!"
- "Where are the boys?"
"Up to no good again, I'd say. You know what they're like."
Usually said about children, or with humour when referring to adults.
My wife said, "Our kids have been up to no good again. We've got to
Contributor: Matt Errey