傑作だ

it's a masterpiece

→ 傑作
phrase Rare #25,079
it's a masterpiece 傑作 means “masterpiece”; だ makes the statement casual and direct. It can also describe something amusing or remarkable, like “that was a sight.”
JA: この映画は傑作だ。
EN: This movie is a masterpiece.

傑作だぜ

It's a masterpiece.

— グッドフェローズ (1990)

この話は傑作だ。

This story is a masterpiece.

まさに傑作だ。

It’s truly a masterpiece.

それらはヨーロッパ芸術の偉大な傑作だ。

They are great masterpieces of European art.

傑作だよ

It's a masterpiece.

— High and Low (1963)