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
Patrick in New York City is curious about the term ride or die, which describes a friend, fan, or romantic partner who is devoted to the end. The expression shows up in the mid-1990s in hip hop and the work of Tupac Shakur and The Lox, and often...
Sean in Oneonta, New York, says that when he was growing up in New Jersey, his family would pile in the car and set off on a surprise adventure, whether a short distance or long, and the kids would be told only that they were going on Buxtehude...