pompous
adjective disapproving uk/ˈpɒm.pəs/ us/ˈpɑːm.pəs/
妄自尊大的，自以为是的
too serious and full of importance
He's a pompous old prig who's totally incapable of taking a joke. 他是个傲慢自负的老头，根本开不起玩笑。
He can sometimes sound a little pompous when he talks about acting. 他谈起表演来有时会显得有点自负。