noun
rapscallion
rap-SKAL-yun/ræpˈskæljən/
A mischievous or dishonest person.
The sly rapscallion steals a wallet from the unsuspecting passerby's bag.

Etymology
Rascallion was a fanciful expansion of rascal, a word used for a low or dishonest person. Rapscallion preserves that sense, including the milder use for someone mischievous.
In context
That rapscallion “up back!” Had Valancy Stirling married _him_?
More examples
- Those rapscallions swapped the salt and sugar again.
- The charming rapscallion cheats anyone who trusts him.
- Grandpa calls me a rapscallion when I sneak another cookie.
Forms
rapscallion · rapscallions
Similar words
- rascal
- Often suggests affectionate disapproval of playful or mischievous behavior.
- scoundrel
- Emphasizes serious dishonesty or bad character rather than playful mischief.
- rogue
- Can suggest an appealing rule breaker rather than outright villainy.