cheeky devil
A silly, impudent, or mischievous person. Usually said as a mild, playful rebuke. You ate all the cookies, you cheeky devil! Those boys are cheeky devils, so don't let them sit together in class. You were the mastermind behind this prank, weren't you? Wow, you're a cheeky devil.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.