slip someone's mind

US /slɪp ˈsʌm.wʌnz maɪnd/
UK /slɪp ˈsʌm.wʌnz maɪnd/
"slip someone's mind" picture
1.

olvidarse, pasarse por alto

if something slips your mind, you forget it

:
I meant to call her, but it completely slipped my mind.
Quería llamarla, pero se me olvidó por completo.
The meeting time must have slipped his mind.
La hora de la reunión debe habérsele olvidado.