OSMC

"Oh Suck My Cock"
An online abbreviation, used as a retort to , well, anything.

Some Guy: Hi!
You: OSMC

by Joseph Staline June 7, 2005

OSMC

Old School Minecraft

Playing the game on a server without any plugins or teleports.

“Hey, I heard Jeremy is starting up an OSMC server, you think I can join?

by Hometown Mervin June 1, 2019