MM 

Saying someone not measured by cm, just mm. (could mean any measurements: height, dick length, etc.)

MM was sleeping!! MM was eating!!

MM by fattylizzo February 29, 2024

mm 

murder mystery, a roblox game.

"hop on mm"
"ok"

mm by ivlaineis February 7, 2025

mm

(verb, noun, text response)
1. The universal sign that Jayla (or anyone channeling her energy) is officially done with the conversation. Usually typed as “mm” to show boredom, disinterest, or the desperate hope that you’ll take the hint and stop talking.

“So anyway, did you see what happened on—”
“mm.”
“Oh… okay.”

mm by NotSilvaGG November 12, 2025

:mm: 

you know that one meme of the guy pursing his lips and lookin all judgy? yeah. :mm:

wow i can’t believe andrew is a snake :mm:

:mm: by jacinth May 29, 2018

\mm/ 

Too Much Fucking Metal For One Hand

That Concert Was Fucking Awesome \mm/

\mm/ by Sabe 1 March 9, 2005

\mm/ 

too much metal for one hand. done by putting hands in fists, putting them together (like the m's) and sticking up both your pinkies

woah slayer is way to heavy better switch from \m/ to \mm/

\mm/ by straemer August 24, 2006

(mm) 

A Skype emoticon signalling something is nice.

-I had some nice ice cream today!

-(mm)

(mm) by Bob Millerer February 18, 2011