tell me about it
Used to express agreement and sympathy with the previous speaker’s statement.
There's always got to be a struggle. What else is there? That's what life is made of. I don't know anything else. If there is, tell me about it. Van Morrison
I actually didn't get to go to my prom. I left high school when I was 16 to join 'NSYNC. I felt that was something I always missed out on, and all my friends got to go and would tell me about it. Lance Bass