Top Definition
Lesser known sexual activity between two women consisting of the connection of the positive and negative terminals of a car battery to the women's respective clitoral piercings, followed by a vigorous scissoring session and resulting in an electrifying, spark-filled experience for both parties.
Lacey and June lit up the room last night, as their Die Hard-enhanced metallic muffs engaged in a Mechanicsburg Spark Plug.
by J.J. Jingleheimerschmidt February 25, 2009
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