| The fact that he was employed there had completely slipped my mind. |
| I had heard something about this, but it slipped my mind, maybe because I'm not in the proper demographic. |
| They weighed down my suitcase, but declaring them slipped my mind. |
| Exactly when I started shaving has slipped my mind, but it was in my early teens, so I've been doing it for close to a quarter century. |
| Either it slipped my mind that I was, in fact, 19, or I'd suffered momentary aphasia. |
| I meant to call her today, but it completely slipped my mind. |
