til the cows come home

'til the cows come home

For a very long, indefinite amount of time; forever. You can wait 'til the cows come home, but you'll never see that law passed in this country! My wife was talking on the phone with her sister 'til the cows came home last night! If you guys stay out ’til the cows come home, you'll be exhausted at work tomorrow.
See also: come, cow, home
Farlex Dictionary of Idioms. © 2022 Farlex, Inc, all rights reserved.

(un)til the cows come home

Rur. until the last; until very late. (Referring to the end of the day, when the cows come home to be fed and milked.) We were having so much fun that we decided to stay at the party until the cows camehome. Where've you been? Who said you could stay out till the cows come home?
See also: come, cow, home, til
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

till/until the ˈcows come home

(informal) for a long time, or for ever: You can talk till the cows come home, but you’ll never persuade me to go with you!
See also: come, cow, home, till, until
Farlex Partner Idioms Dictionary © Farlex 2017
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References in periodicals archive ?
As for her plans for 2013, Cheryl says she is trying not to make too many plans: "You can plan 'til the cows come home and then the cows never show up."
So, "'til the cows come home" could be as little as a few hours or as long as a year or more.
You can troll his words for "what he's really thinking" 'til the cows come home. Has he invited you to the mall or bought you a burger or kissed you recently?
Just plug it in, squeeze the trigger and till 'til the cows come home. It's surprisingly powerful but still easy to guide and control, and the handle folds up, so it only sips at precious storage space.
But you can't eat it 'til the cows come home and expect your thighs to stay "fat-free."
Play Hide-and-Seek 'til the cows come home. Quack away your summer leading rounds of Duck-Duck-Goose.