tell me about it

(figuratively) to speak to someone who doesn't listen; to preach to deaf ears

(Quebec, informal) to talk through one's hat

(informal) to talk about fashion, to talk clothes; to engage in girl talk; to chew the rag

(figuratively) to put one's foot in one's mouth, to be like a bull in a china shop, to hit the wrong note (to broach a sensitive topic in an inappropriate setting, where that topic is taboo; to be completely tactless)

do you speak French?

(informal) look who's talking! you're one to talk! you can talk!

European Parliament

(informal) to get an earful, to be scolded

(informal, figuratively) to like the sound of one's own voice (to smugly enjoy hearing oneself talking, to be more focused on how one talks than on one's interlocutor)