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An instance in which one forgets something or acts strangely or foolishly, humorously attributed to one's advanced age. I thought Mom knew Joe's phone number, but she's having a senior moment and can't remember it either.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
a senior momentINFORMAL
A senior moment is an occasion when someone, usually an elderly person, makes a silly mistake or forgets something. He is 69 in February and sometimes has a senior moment, when the flow of words dries up. Note: This expression is used humorously.
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
senior momentan untoward incident, especially one exhibiting forgetfulness, that is attributed to old age. informal humorous
Farlex Partner Idioms Dictionary © Farlex 2017
n. a lapse of memory in an older person. I had a senior moment and forgot your name. Sorry.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
A temporary lapse of memory, a kind of forgetfulness experienced increasingly as one ages. The term dates from the second half of the 1900s and has become so popular that a game for improving one’s mental acuity is named “Senior Moment.” Paul Krugman’s review of a book about the United States’s aging population and the economic outlook was entitled America’s Senior Moment (New York Review of Books, March 10, 2005).
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer