OPM

Acronym for the anime and manga series One-Punch Man.

Bro 1: I can't believe how shit the newest OPM season looks, dude.

Bro 2: Looks like its frames were drawn in MS Paint. Not at all like OPM manga.

by Droggellord November 17, 2025

OPM

Ounces per Minute: the rate at which one consumes alchohol, regardless of the beverage.

Steve drinks wine at 3.69 OPM and tequila, and beer, and mixies

by JakeNotJohn August 19, 2017