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
Shila	-	Indian, Marathi
Jacobine	yah-ko-BEE-nə (Dutch)	Norwegian, Danish, Dutch
Ira	['aiərə]
Terence	TER-ənts	English
Balchin	['bɔ:ltʃin]
Jerko	YER-ko	Croatian