Rm

Slang terminology for the word "room", created by Charles Manson and popularized by Brad DeJonge

"I just killed a hooker in that rm"

RM

Rap Monster (Kim Namjoon) from K-pop band "BTS". ^^

RM is so hot!

rm process

The process of "Rming" (remaking) a game due to unwanted outcomes in the early stages of said game which put one or both players in a bad position. Usually happens in ridiculously long games like Civilization 5.

"Hey are you guys done playing?"
"No we haven't even started yet"
"But its been 5 hours!?!"
"Were in the rm process"