だけだろ

just ... right?

→ だけ
phrase Rare #35,894
just ... right? だけ means “only” or “just,” while だろ adds a casual, often assertive “right?” or “probably.”
JA: 冗談を言っただけだろ。
EN: You were just joking, right?

それにこんなのはほんの数人だけだろ

Besides, there are only a handful of people like this.

— 罪人たち (2025)

お前が払うのはせいぜい今夜だけだろ

At most, you'll only be paying for tonight, right?

— 罪人たち (2025)

ひとつ運んだだけだろ?

You only carried one, right?

— ライフ・イズ・ビューティフル (1997)

臆病なだけだろ。

You're just a coward, that's all.

他人に見られないのは自分の家の中だけだろ

The only place where no one can see you is inside your own home, right?

— The Garden of Sinners: Paradox Spiral (2008)