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
Josse	-	French (Rare), Medieval French
Hadad	-	Near Eastern Mythology
Sanjin	-	Croatian
Wayna	-	Native American, Quechua
Na'ima	-	Arabic
Huld	-	Norse Mythology