가 아니잖아

isn't ...; it's not ... you know

→ 가
phrase Uncommon #8,513
isn't ...; it's not ... you know Used after a noun to emphasize or remind someone that something is not that noun or thing. The particle 이/가 appears according to the noun: 이 아니잖아 after a consonant and 가 아니잖아 after a vowel. The ending -잖아 often conveys “you know” or “as you know” and is informal.
KO: 그건 내 임무가 아니잖아!
EN: That isn't my responsibility, you know!

여기는 호주가 아니잖아

This isn't Australia, is it?

— 마농의 샘 1부 (1986)

이탈리아어가 아니잖아

It’s not Italian.

— 특별한 날 (1977)

템포가 아니잖아!

It's not my tempo!

— 위플래쉬 (2014)

보통 왜가리가 아니잖아!

It's not a normal magpie!

— 그대들은 어떻게 살 것인가 (2023)

그건 내 임무가 아니잖아!

That's not my mission!

— 델리카트슨 사람들 (1991)

집이 전부가 아니잖아!

Home isn't everything!

— 음식남녀 (1994)

그게 문제가 아니잖아?

That's not the problem, is it?

— 불릿 트레인 (2022)