Definitions

1. noun

a mischievous or unprincipled person, especially a young one

“The little rascal always managed to get into trouble at school.”

2. verb

to behave or act as a rascal, typically in a mischievous or unprincipled way

“He’s been rascal-ing around the office all day, causing chaos wherever he goes.”

3. adjective

mischievous or unprincipled in behavior or character

“The rascal of a child knocked over my vase and ran away laughing.”