We found 8 dictionaries that define the word up to no good:

General (6 matching dictionaries)

1. up to no good: Merriam-Webster
2. up to no good: Oxford Learner's Dictionaries
3. up to no good: Wiktionary
4. Up to No Good: Wikipedia, the Free Encyclopedia

Miscellaneous (1 matching dictionary)

5. up to no good: Idioms

Slang (1 matching dictionary)

6. up to no good: Green’s Dictionary of Slang

Definitions from Wikipedia (Up to No Good) ▸ noun:  the third solo album by the American musician Peter Wolf, released in 1990 on MCA Records. Phrases: be up to no good, more... ▸ Words similar to up to no good ▸ Usage examples for up to no good ▸ Idioms related to up to no good ▸ Wikipedia articles (New!) ▸ Words that often appear near up to no good ▸ Rhymes of up to no good ▸ Invented words related to up to no good