**Hope someone can help me with the meaning of this sentence.**

**しかもグーでとか手加減なしじゃん！！！ (my guess : "Also you're not going easy on me at all
with that punch/ You punched me too hard !!!" )**

**Context: MC is talking with his cousin, and she introduced her classmate and
also her best friend to him. Then MC punched her (lol) for being impolite with
her friend.**

Kotori (MC's Cousin)「あたしのマブ。チワプー。可愛いでしょ？」

MC「チワプー？」

Chiwa「はい。私、天枝千羽って言います」

Kotori「そッ。千羽だから『チワプー』。髪が揺れると、トイプードルの耳みたいで可愛いの」

MC「天枝さん。ムカついてたら殴っていいよ？ グーで」

**Kotori「だからマブだって言ってんじゃん！！ しかもグーでとか手加減なしじゃん！！！」**

Chiwa「あはは……大丈夫ですよ。みんなからそう呼ばれてますから」
CC BY-SA 4.0
2023-04-01T23:52:09.693
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2023-04-07T20:17:39.670
2023-04-02T00:01:02.430
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question
grammar meaning reading-comprehension japanese-to-english
Confused by a sentence with double negation なしじゃん！(reaction of MC's little cousin after being punched by him (●｀・ω・)=Ｏ)｀-д゜)
* グー: "(closed) fist" ( _rock_ as in the _rock-paper-scissors_ game)
  * 手加減なし: "no holding back", "pulls no punches", "merciless". なし is a kind of suffix. See: [What does 「なし」in 「問題なし」 mean?](https://japanese.stackexchange.com/q/17896/5010)
  * ～じゃん: "huh?", "you know?", "isn't it?"

> しかもグーでとか手加減なしじゃん！！！  
>  And (hitting) with a fist? That's too merciless, isn't it!?

To understand this, you need to know that a [typical _tsukkomi_
gesture](https://www.japanesewithanime.com/2021/07/tsukkomi-gesture.html) is
done with an open hand. MC jokingly suggested グーで殴っていい ("You can punch Kotori
with a closed fist"), which is too merciless (手加減なし) as a _tsukkomi_ , so
Kotori pointed this out.
CC BY-SA 4.0
2023-04-03T05:43:10.150
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answer