at (one's) expense
1. Falling under one's financial responsibility. Once I learned that the trip was at my expense, I decided not to go. Any damage to the hotel room will be at your expense, understand? Uh, did you know that the duty fees are at the buyer's expense?
2. To one's detriment or disadvantage. I was furious when I heard the other kids telling jokes at my little brother's expense. You're supposed to be my friend! How could you start that vicious rumor at my expense? People who truly care about you won't say things at your expense.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.