pump pump

pump pump /pʌmp pʌmp/, int.
1. Representing the sound of gunshots

1993 Snoop Doggy Dogg, "Pump Pump," 0:02, Pump pump pump pump pump pump.

2002 Bone Thugs-n-Harmony, "Pump Pump," 1:08, You ain't gotta listen but I'ma let you hear it / Pump Pump, Buck buck buck buck buck.