ガチムチ/がちむち. A Japanese term that literally means "muscular chubby," which refers to big, bulky body types that are very muscular, but also have a good amount of fat.
Jiraiya, Go Fujimoto, and Ebisubashi Seizoh are just a few of the many bara manga artists who specialize in gachimuchi characters.

Many offseason bodybuilders tend to have gachimuchi body types.
by odan August 9, 2012
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Japanese BL term for really buff gay men like Billy Herrington.
Billy Herrington's (Aniki) pornos are the epitome of gachimuchi wrestling.
by BillyHerrington May 3, 2010
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Real man 1-i'll watch gachimuchi
Real man 2 - i'll do this with you
Pussy- you are gaysq
*Pussy is dead*
by BoyNextD00r October 18, 2021
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Gachimuchi or Gachi is a large group of music/Video made with gay porn stars including, Van Dark Holm and Billy Herrington.
Boy 1: Hey man check out this Gachimuchi?
Boy 2: Sure.
Aftermath
Boy 1: How did you like it?
Boy 2: What is wrong with you? Do you enjoy this stuff?

Boy 1: Yeah the songs are not bad.
Boy 2: You fucking Gay?
by Ram Ranch Jotaro January 9, 2020
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Gachimuchi-terrorists are people who listen to music with gay sounds. The full definition of Gachi muchi terrorist is sick person. For normal thinking people they are just mentaly weak people with little dream to bless themselves on internet community. They are more than normal memers but at least they just think of it.
You are group of Gachimuchi-terrorists.
by Feederick November 25, 2018
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