spark plug

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spark plug

One who energizes others with one's ideas and positive personality. Primarily heard in US. Kelly was the spark plug the company needed to get their new project off the ground.
See also: plug, spark
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
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References in periodicals archive ?
If you open the hood and just touch the probe of the test light to any of the spark-plug wires while the car is running, the light will flash, indicating that electricity is pulsing through those wires.
What we'd instruct you to do is, next time the car dies, open the hood and touch the test light to a spark-plug wire.
A Chicago teacher has been accused of punishing disruptive students with prolonged electric shocks, using a spark-plug and a current-producing crank.
They had the unfortunate habit of fusing their spark plugs to their engine blocks, making a spark-plug change a $2,500 job sometimes.
That means there's only one correct spark-plug type for your truck, Tony.