to slip one's mind
01
to be forgotten or disregarded
![to [slip] {one's} (mind|memory) definition and meaning](https://cdn.langeek.co/photo/44916/original/?type=jpeg "to [slip] {one's} (mind|memory) definition and meaning")
Idiom
Informal
例子
I'm sorry, but your birthday invitation must have slipped my mind amidst all the chaos at work.
It completely slipped my mind to pick up groceries on the way home, so we'll have to make do with what we have.
