a homemade pistol, typically consisting of a metal tube taped to a wooden stock and firing a .22-caliber bullet.
Origin of zip gun
First recorded in 1945–50
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
US and Canadian slang a crude homemade pistol, esp one powered by a spring or rubber band
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012