Meaning of 大概 in「ボクも大概だ」?


The first character starts by saying their view on a situation, the second
then replies with an opinion that is viewed as ridiculous and unbelievable by
the first. This first character then replies:

> ボクも大概だけどキミも相当だな

In the subtitles this is translated as:

> I have issues, but you're just as bad.

While I understand the translation for the second half, 「ボクも大概だ」 doesn't seem
to make sense.「大概」 meaning 'generally' or 'mostly', is it akin to the phrase
'I'm not all there' in English?




Dictionaries say the basic meaning of 大概 is something like "moderate",
"overview", "almost all", "usually", etc.

>   * 大概のところでやめる / 大概にする to stop before going too far; not to go to extremes
>   * この店で大概の品物は見つかる。 Almost all items are found in this shop.
>   * 土曜日は大概会社にいる。 I am usually at my office on Saturdays.
>

However `noun + も + 大概だ` means something different. It's a way of indirectly
implying something/someone is equally out of the way, abnormal, extreme, bad,
etc. Basically it's interchangeable with `noun + も + 相当だ`. I don't know if
this usage is originally sarcasm or euphemism. For some reason we usually see
も used with 大概 in this sense, so you can memorize this as a set phrase.

Examples:

>   * 日本語は難しいといわれるが、英語も大概だと思う。
>   * あの部長は怒ってばかりいますけど、部長も大概ですよ。
>

[大辞林 has the corresponding
definition](https://kotobank.jp/word/%E5%A4%A7%E6%A6%82-556507#E5.A4.A7.E8.BE.9E.E6.9E.97.20.E7.AC.AC.E4.B8.89.E7.89.88):

> ④ふつうでないこと。はなはだしいこと。

To my surprise, デジタル大辞泉 [does not
explain](https://dictionary.goo.ne.jp/jn/132643/meaning/m0u/%E5%A4%A7%E6%A6%82/)
this usage at least directly.

By the way, the sentence in question can be rephrased as ボクもボクだけどキミもキミだな. See:
[Meaning of pattern
「XがXなら、YもYだ」](https://japanese.stackexchange.com/q/870/5010)




Dictionaries say the basic meaning of 大概 is something like "moderate",
"overview", "almost all", "usually", etc.

>   * 大概のところでやめる / 大概にする to stop before going too far; not to go to extremes
>   * この店で大概の品物は見つかる。 Almost all items are found in this shop.
>   * 土曜日は大概会社にいる。 I am usually at my office on Saturdays.
>

However `noun + も + 大概だ` means something different. It's a way of indirectly
implying something/someone is equally out of the way, abnormal, extreme, bad,
etc. Basically it's interchangeable with `noun + も + 相当だ`. I don't know if
this usage is originally sarcasm or euphemism. For some reason we usually see
も used with 大概 in this sense, so you can memorize this as a set phrase.

Examples:

>   * 日本語は難しいといわれるが、英語も大概だと思う。
>   * あの部長は怒ってばかりいますけど、部長も大概ですよ。
>

[大辞林 has the corresponding
definition](https://kotobank.jp/word/%E5%A4%A7%E6%A6%82-556507#E5.A4.A7.E8.BE.9E.E6.9E.97.20.E7.AC.AC.E4.B8.89.E7.89.88):

> ④ふつうでないこと。はなはだしいこと。

To my surprise, デジタル大辞泉 [does not
explain](https://dictionary.goo.ne.jp/jn/132643/meaning/m0u/%E5%A4%A7%E6%A6%82/)
this usage at least directly.

By the way, the sentence in question can be rephrased as ボクもボクだけどキミもキミだな. See:
[Meaning of pattern
「XがXなら、YもYだ」](https://japanese.stackexchange.com/q/870/5010)

