a dog's age

a dog's age

An exceptionally long period of time. It's been a dog's age since I worked one of these machines, but I'll give it a shot!
See also: age
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

dog's age

see under coon's age.
See also: age
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

a dog's age

A long time. An American slang term dating from about 1830, this expression doesn’t make a great deal of sense, since the average dog is not especially long-lived. It appeared in print in 1836: “That blamed line gale has kept me in bilboes such a dog’s age” (Knickerbocker magazine).
See also: age
The Dictionary of Clichés by Christine Ammer Copyright © 2013 by Christine Ammer
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