Tell me about it!

私にそれを言う必要ないでしょう！（こっちこそそれを痛感しているよ）

1. A: Everything's so expensive these days!
B: Tell me about it! I just spent 100 dollars taking my family to the movies!


2. A: It's tough raising teenagers nowadays.
B: Tell me about it! I've got four teenaged children myself!


3. A: John's kind of tough to work with.
B: Tell me about it! I've worked with him for five years now.