tell me about it
US /tel mi əˈbaʊt ɪt/
UK /tel mi əˈbaʊt ɪt/

1.
本当にそうですね, よくわかります
used to express sympathy or agreement with what someone has just said, especially when they have been complaining about something
:
•
“The traffic was terrible this morning.” “Tell me about it! I was stuck for an hour.”
「今朝の交通はひどかった。」「本当にそうですね!1時間も立ち往生しました。」
•
“I'm so tired of all this paperwork.” “Tell me about it, I've been doing it all week.”
「この書類仕事にはうんざりだ。」「本当にそうですね、私も一週間ずっとやっています。」