- take\ upon\ oneself
- • take (up)on oneselfv. phr.1. To accept as a duty or responsibility.
He took it on himself to see that the packages were delivered.2. To assume wrongfully or without permission as a right or privilege.
You should not have taken it upon yourself to accept the invitation for the whole family.
Словарь американских идиом. — СПб., Изд-во "Лань". Оригинал: A.Маккей, М.Т.Боткер, Дж.И.Гейтс. 1997.