だけだろ

it's just ... right?

→ だけ
phrase Rare #38,353
it's just ... right? Informal and often rhetorical, combining だけ (just/only) with だろ (right?/probably). It can sound challenging or dismissive depending on context.
JA: 冗談を言っただけだろ?
EN: You were just joking, right?

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.

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)

それにこんなのほんの数人だけだろ

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

— 罪人たち (2025)