a bright spark

(British & Australian)

an intelligent person

Usage notes: This phrase is often used humorously to mean the opposite.

Some bright spark was clearing up and threw my invitation away.

Name	Pronounced	Usage
Zenais	-	Ancient Greek
Eric	['erik]
Gosia	-	Polish
Apollonia	-	Ancient Greek, Italian
Fredenand	-	Ancient Germanic
Chelo	CHE-lo	Spanish