slip (one's) mind

slip (one's) mind

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

slip one's mind

[for something that was to be remembered] to be forgotten. I meant to go to the grocery store on the way home, but it slipped my mind. My birthday slipped my mind. I guess I wanted to forget it.
See also: mind, slip
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

slip one's mind

Be overlooked or forgotten, as in I meant to pick up the wine but it slipped my mind. This idiom was first recorded about 1340.
See also: mind, slip
The American Heritage® Dictionary of Idioms by Christine Ammer.

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
Collins COBUILD Idioms Dictionary, 3rd ed.

slip somebody’s ˈmemory/ˈmind

forget about something or forget to do something: I was supposed to go to the dentist today, but it completely slipped my mind.
See also: memory, mind, slip
Farlex Partner Idioms Dictionary
See also:
  • slip mind
  • slip one's mind
  • slip somebody's memory/mind
  • slip your mind
  • have (one's) mind on other things
  • have your mind on other things
  • to my mind
  • have a mind to
  • have a mind to (do something)
  • have a mind to do something