How to Say “Muscle” in Japanese Slang

筋肉
kinnikustandard, noun
The ordinary word for "muscle" is 筋肉 (kinniku), and it is also heard in gym talk. Slang for a muscular person is マッチョ (maccho). It is also called マッスル (massuru).
Meaning: muscle, muscular (noun)

Ways to say it

“muscle” in Japanese
Japanese Romanization Note
筋肉 kinniku standard, noun
マッチョ maccho slang, muscular person
マッスル massuru slang, loanword

マッチョ (maccho) describes a muscular man, as in マッチョな人 (maccho na hito). マッスル (massuru) is a katakana loan used in fun names for gyms and foods. Training is called 筋トレ (kintore), short for 筋肉トレーニング (kinniku toreeningu).

When do people say it?

A popular gym saying is 筋肉は裏切らない (kinniku wa uragiranai), "muscles never betray you".

Did you know?

  • The word 筋トレ (kintore) became a wide trend in Japan, and it is a short form most gym users say instead of the full word.

Examples in context

  • 彼は筋肉がすごい。
    Kare wa kinniku ga sugoi.
    He has amazing muscles.
  • あの人はマッチョだね。
    Ano hito wa maccho da ne.
    That person is muscular.
  • 毎日筋トレしています。
    Mainichi kintore shiteimasu.
    I do muscle training every day.

Example conversation

Sho and Daiki are at a gym.

  1. Sho

    最近、筋トレしてるの?
    Saikin, kintore shiteru no?
    Are you working out lately?
  2. Daiki

    うん、毎日だよ。
    Un, mainichi da yo.
    Yes, every day.
  3. Sho

    マッチョになったね。
    Maccho ni natta ne.
    You have become muscular.
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Patricia Sabrina
Patricia SabrinaHelp make this guide better. Spot a mistake, know another way to say it, or have an example from real life? Share it below.
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