up to no good

idiom

Definition of up to no good

informal
: doing bad things or planning to do bad things If you ask me, that woman's up to no good.

Comments on up to no good

What made you want to look up up to no good? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

marked by turns or indirection

Get Word of the Day daily email!

Test Your Vocabulary

Summer 2019 Words of the Day Quiz

  • a-bowl-of-peach-sorbet-with-cut-peaches-next-to-it
  • Which is a synonym of desideratum?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!