Definitions:

1. A presumptuous, rude, or mischievous person. NOUN
   • That jackanapes thinks they're better than everyone else.
2. A tame monkey, NOUN
   • Did you see that jackanapes dancing to the accordion?
3. A term that originated in the 16th century and is used to describe a mischievous or impertinent person, especially a young one. NOUN
   • The cunning jackanapes tricked he gullible villagers out of their valuables.
4. Refers to someone who is cheeky, impudent, or foolish. NOUN
   • The immature jackanapes giggled and pointed at the unfortunate victim, showing no empathy.

Synonyms:

• brat
• hellion
• lightweight
• rascal
• rogue
• scoundrel
• smart aleck