for crying out loud!

これは驚いた、あらまぁ、なんてことだ、ばかだなぁ

Ex

• For crying out loud, she screams onto me.
• For crying out loud, you’re like cats!

Reference source

• https://ejje.weblio.jp/content/for+crying+out+loud
• http://www.slangeigo.com/archives/51941908.html