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

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