schoolboyish
/skulˌbɔɪɪʃ/
adjective
- Characteristic of or typical of a schoolboy, especially in being playful, mischievous, or immature.
- He had a schoolboyish grin when he told the joke.
- Her schoolboyish enthusiasm for video games surprised her coworkers.
- The prank was a schoolboyish attempt to get attention.
Antonyms