battery pack
n.— «Brannon was described by a local gang investigator as a “battery pack” within his gang set, a term used to describe a member who is always on the streets, willing to do anything for the gang. The investigator said Brannon has been sent a variety of gang tasks, from murders to decoy tasks.» —“Net widens for accidental fugitive” by Andrew Kitchenman The Times (New Jersey) June 14, 2007. (source: Double-Tongued Dictionary)
Further reading
What’s up with ketchup? The shifting history and spelling of the name of this condiment. For centuries, ketchup was a fishy sauce originating in Asia—the tomatoes came only later! Plus, a new book shows what’s lost when a language dies: when there...
Lisa from Tabernacle, New Jersey, grew up using the term cabbage night to refer to the night before Halloween when all manner of mischief takes place. The term itself goes back to the 1860s, while the custom of pranks on October 30 is older. The...