multilingual 

the ability to speak multiple languages

"Are you multilingual?"
"Yes. I can speak English, Spanish, Chinese, and Hebrew."

multilingual by Ruby Cube July 25, 2016

multiplayerpiano.com 

A website created by Brandon Lockaby originally launched in February 2012 that allows users to play piano and chat with each other in real-time using JavaScript and socket.io. Users in the same room share one piano.
50% of the users in MPP are anonymous's and 20% of others are bots or people who use midi players.

Person 1: Have you seen multiplayerpiano.com?
Person 2: Yeah, some guy was spamming the chat and piano in every room.

multiplayerpiano.com by HokoraYinphineMPP August 23, 2019

Multilimb 

A fetish for extra/multiple body parts on a person that is more than what is considered normal. Usually limbs, genitalia, fingers and toes, heads, and sometimes facial features; human or otherwise (in reference to furries).

Sometimes shortened to just "multi".

I was browsing Twitter when I stumbled upon a user focused on posting multilimb content.

Multilimb by IWIWAT March 28, 2023

multipotentialite 

Somebody who has potential in multiple fields.

I am a multipotentialite because I am double majoring in music and biology.

multipotentialite by choonboolly August 22, 2016

multiple nationality disorder 

lieing about one's nationality and changing it every year to seem cool.

joey was puerto rican in 8th grade, dominican in 9th, cuban in 10th, columbian in 11th, and brazilian in 12th. joey is really white and chinese, he got multiple nationality disorder

multiple nationality disorder by giveyouthetruth November 23, 2010

multiple guess 

A way of describing a multiple choice test.

Especially if it's ridiculously hard.

Dr. Kuhn (Biology Teacher Extraordinaire): We're going to have a multiple guess test--I mean multiple choice test--tomorrow. Practice tonight by guessing what my favorite jungle animal is.

multiple guess by PaperMachete October 25, 2005

Multiplayerfag 

In gaming, someone who buys and plays video games purely for the multiplayer. They can be found mostly on Call of Duty games as well as Halo games.
They are the type of people who want multiplayer in all games.

One example would be the upcoming Dead Rising 2, in which multiplayer was added thanks to the increase of multiplayerfags.

If it weren't for multiplayerfags, many game series such as Halo, Gears of War, and COD games wouldn't have so many sequels.

Bob went to buy a quality game, he bought Dead Rising and enjoyed it very much.
Fred(Multiplayerfag) went to buy a multiplayer game, he bought the newest generic halo sequel.

Multiplayerfag by Waffle Sage June 26, 2010