senior moment

An allusion to the memory difficulties sometimes experienced by senior citizens.

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senior moment (plural senior moments)

1. (humorous, sometimes derogatory) A brief interval of forgetfulness or inattention.

• blonde moment

• draw a blank
• brain fart

• “senior moment”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.
• “senior moment”, in Cambridge English Dictionary, Cambridge, Cambridgeshire: Cambridge University Press, 1999–present.
• “senior moment” in Longman Dictionary of Contemporary English, Longman.