Wordnet 3.0
ADJECTIVE (1)
1. 
 befitting or characteristic of a young boy; 
- Example: "a boyish grin"- Example: "schoolboyish pranks"[syn: boyish, boylike, schoolboyish]
WordNet (r) 3.0 (2006):
schoolboyish
    adj 1: befitting or characteristic of a young boy; "a boyish
           grin"; "schoolboyish pranks" [syn: boyish, boylike,
           schoolboyish]