じゃあるまいし
(Ja aru mai shi)
it's not as if / since it's not like.
Connection rules
- ＋Noun + じゃあるまいし / ではあるまいし; plain form + わけじゃあるまいし.
- ＋Rejects an unreasonable premise — often used to correct or scold.
- ＋Common fixed type: 子供じゃあるまいし ('you're not a child, are you?').
Examples
1.
子供じゃあるまいし、そんなことで泣かないで。
Kodomo ja aru mai shi, sonna koto de naka nai de.
You're not a child — don't cry over that.
「it's not as if / since it's not like」
2.
初めてじゃあるまいし、もう慣れたでしょう。
Hajimete ja aru mai shi, mou nare ta desho u.
It's not your first time — surely you're used to it by now.
「it's not as if / since it's not like」
Practice
You're not a rookie anymore, so please don't make such a simple mistake.
___、そんな単純なミスはしないでください。
Romaji also accepted