slip your mind

slip (one's) mind

To be forgtten, especially of an obligation. I'm sorry I didn't call you back sooner, it totally slipped my mind.
See also: mind, slip

slip your mind

If something slips your mind, you forget it. I was supposed to call her this morning and it slipped my mind. The reason for my visit had obviously slipped his mind.
See also: mind, slip
References in periodicals archive ?
If you've let your website slip your mind, don't worry.
And with Father's Day just around the corner, make sure you don't let this slip your mind and get a red card from Dad.
There are things that slip your mind from time to time, like the rest of us there's so much going on it's easy to forget.
We know that things can slip your mind at this time of year and having the reassurance of a last minute delivery service can be a real help.
You mean to clean but every day folds into the next, and basic chores seem to slip your mind.