애라고

that [someone] is a kid

→ 애
phrase Rare #17,941
that [someone] is a kid 애 means “kid” or “child,” and 라고 marks the statement as something said, claimed, or thought. The exact translation depends on the surrounding sentence.
KO: 다들 걔가 애라고 생각해요.
EN: Everyone thinks they're a kid.

엄청 인기 많은 애 라고

They’re incredibly popular, you know.

— 빅 식 (2017)

다른 남자의 아이 인데 그 사람 애 라고 속인 거 지?

It's another man's child, but you lied and said it was his child?

— 타락천사 (1995)

애 라고 모를 줄 아냐?

Just because I'm a kid, you think I wouldn't know?

— Night in Paradise (2020)

걔가 애 라고?

You call *him* a kid?

— 걸리 보이 (2019)

누나 애 라고!

She's a kid!

— 목소리의 형태 (2016)