a spark plug

(American informal)

a person with a lot of energy and ideas who encourages the other people in a group The school's new principal is the spark plug in a team that includes parents, teachers and community.

Common Names:

Name	Pronounced	Usage
Cenk	JENK	Turkish
Vasko	-	Macedonian, Bulgarian
Halvdan	-	Norwegian
Ansell	['ænsəl]
Dian	DEE-ahn	Indonesian
Ruaraidh	-	Scottish