às custas de angolul

at the expense of▼(in a way as to harm somebody or something)
preposition
[UK: ət ðə ɪk.ˈspens əv ˈsʌm.θɪŋ] [US: ət ðə ɪk.ˈspens əv ˈsʌm.θɪŋ]