Definitions for: Boyish

[adj] befitting or characteristic of a young boy; "a boyish grin"; "schoolboyish pranks"

Webster (1913) Definition: Boy"ish, a.
Resembling a boy in a manners or opinions; belonging to a
boy; childish; trifling; puerile.

A boyish, odd conceit. --Baillie.

Synonyms: boylike, immature, schoolboyish, young