When someone says “you’re one to talk“, it’s a way of pointing out that the person is being hypocritical or criticizing others for something that they themselves are guilty of. In simpler words, it’s like saying “look who’s talking” or “you do the same thing”.
Here are two examples in sentences:
Example 1:
After being criticized for arriving late, Mike retorted, “you’re one to talk“, pointing out that his friend was often late as well.
Example 2:
Lisa said, “you’re one to talk” when her sister, who also spends a lot of time on her phone, told her she was too attached to her phone.
Here are two examples in conversation:
Example 3:
Sam: You really should stop drinking so much coffee.
Ella: You’re one to talk, Sam. I’ve seen you drink four cups in a day!
Example 4:
Tom: I can’t believe you forgot mom’s birthday!
Jenny: You’re one to talk, Tom. Didn’t you forget her birthday last year?
So, when someone says “you’re one to talk“, they’re pointing out that the other person is being hypocritical or has no room to criticize because they’re guilty of the same thing.