at one's expense
01
彼の費用で, 彼のお金で
used to say who has paid for something
慣用句
例
The trip was arranged at the company's expense.
その旅行は会社の費用で手配された。
02
(particularly of a joke) in a way that causes harm to someone or makes them embarrassed
非難的
慣用句
例
Everyone laughed, but the joke was at my expense.



























