to slip one's mind
- idiom
- Informal
- I meant to call you yesterday, but it completely slipped my mind.
Examples
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- It must have slipped her mind.
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Must have slipped my mind.
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Or did that slip your mind?
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Ah, it slipped my mind.
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Well, it slipped my mind!
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I guess what I wanted to say just sort of slipped my mind.
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With being hurt and all, Mr. Favor, it plain slipped my mind.
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It just slipped my mind.
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It must've slipped my mind.
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She forgot about the meeting because it slipped her mind.
Synonyms
Not remember to do something you intended
Antonyms
How Forgotten
Surface Forms
Morphology
The verb 'slip' combined with 'mind' evokes a simple motion metaphor — something sliding out of one's memory — so a learner who knows 'slip' and 'mind' can plausibly infer the meaning 'forget'. However, this relies on a metaphorical mapping rather than a strictly literal composition, so the relation is only partially predictable without prior exposure.
Etymology
The idiom slip one's mind gives a simple picture: imagine a small note or thought quietly slip off the edge of your mind like a coin sliding from a table. Because the idea has 'slipped' away and you can't reach it, the phrase means 'to forget'.