onepop

To correctly do (achieve) on the first try.

one bullet, one shot.

nail on the head

onepop

by dr.roil July 22, 2014

onepop

an unreliable illegal firearm frequently used by the gangs of Britain.

Unreliable hence the name "onepop" as in it'll likely only fire once.

"don't slide on my block with a onepop"

by yinged August 25, 2022