よくもまあ

you've got some nerve

→ 良く
phrase Rare #24,650
you've got some nerve Expresses indignation or disbelief at someone’s words or actions.
JA: よくもまあそんなことを言えたね。
EN: You've got some nerve saying that.

よくもまあ、あんなものが食べられるね。

I don't know how you can eat something like that.

よくもまあ私に助けてくれなんて言えるもんだね。

You've got some nerve asking me to help you.

よくもまあそんなことができるわね!

How could you possibly do such a thing!

— 甘い生活 (1960)

よくもまあ私にそんな口がきけるね。

How dare you talk to me like that.

よくもまあ、そんな口の利き方ができるね。

How dare you talk to me like that.

よくもまあこんなひどい所に住めるね。

I can't believe you can live in a dump like this.

— ソング・オブ・ザ・シー 海のうた (2014)

よくもまあそんな口のきき方ができるな。

How dare you talk to me like that.