Mugen 

The Ronin guy on Samurai Champloo that looks alot like Spike from Cowboy Bebop

The guy from the Japanese islands on Samurai Champloo is Mugen.

Mugen by Skott November 10, 2004

Mugen 

A 2d fighting game engine for DOS and Linux made by elecbyte that is totally customizable and can be added on to with new characters, stages, and much more.

I was playing mugen the other day, but Evil Ken still handed me my butt on a plate.

Mugen by AXNJAXN August 28, 2003

Mugen 

Honda's motorsport division, they make aftermarket parts for hondas

Mugen Civic Type-R

Mugen by Jay October 23, 2003

Mugen 

Japanesse aftermarket manufacturer who specializes in Hondas. Also races modified NSXs in the Japaneese Grand Touring Car series.

$20K in Mugen parts can make you run mid 13 second quarter mile.

Mugen by Anonymous October 29, 2003

Mugen 

The best fighting game on the PC/Mac. You can put in those characters from various fighting games from Street Fighter to King of Fighters, Mortal Kombat, etc.!!

Guy 1: Scorpion vs. Maki.. You gotta be kidding me!
Guy 2: Dude, this is Mugen. I can put in any characters I want. I can play as Scorpion and fight characters from other fighting game.
Guy 1: Cool. I'm gonna download it and the characters when I get home!

Mugen by ChoujinkiMetalder September 8, 2006

Mugen 

A kid who thinks he gets all the bitches just because he's flirting on Discord. He keeps sending cringy Anime videos as a comeback. Also, mugen has erectile dysfunction.

Mugen: Go get some bitches.
Me: You have none, go outside you Discord kitten picker bitch boy.

Mugen by Sickkunt_Zezus April 13, 2022

Mugen 

A customizable version of CvS vs. Touhou, with a fanbase of pedophiles and crazy motherfuckers with a severe inferiority complex

I can't find a slow, boring rehash of KOF characters, and pedo-porn. Oh wait, Mugen! FINALLY!

Mugen by Lil' Taste October 24, 2016