Someone is condescending, you are showing your disapproval of the fact that they talk or behave in a way which shows that they think they are superior to other people.
adjective [原级]表现出优越感的,居高临下的
I'm fed up with your money and your whole condescending attitude. 我受够了你的钱和你整个高人一等的态度。
verb [vi. 不及物动词]表现出优越感;屈尊,俯就(condescend 的现在分词)
He has a condescending attitude towards women. 他对女性总是居高临下。