talk out of (one's) arse

talk out of (one's) arse

1. vulgar slang To say foolish things; to talk nonsense. Primarily heard in UK. Don't pay him any mind. He's just talking out of his arse again.
2. vulgar slang To exaggerate one's achievements or knowledge of some subject; to bluff or boast. Primarily heard in UK. Dorothy keeps saying she can outrun anyone in our school, but she's talking out of her arse if you ask me. It seemed like the candidate was talking out of his arse for a while when the debate turned to the topic of tax policy and law.
See also: arse, of, out, talk