old goat
Americannoun
Informal.
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an elderly man who is disliked, especially for being mean to or disapproving of younger people.
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a lecherous man, especially one considerably older than those to whom he is attracted.
Etymology
Origin of old goat
First recorded in 1960–65
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.