For a very long time, indefinite amount of time; forever.
If you say that you can do something until the cows come home, you mean that you can do it for a very long time.
#1 - My girlfriend was talking on the phone with her sister until the cows came home last night!
#2 - They could argue till the cows come home and still not reach an agreement.
#3 - You can keep talking till the cows come home, but you'll never persuade me to go with you!
If you say that you can do something until the cows come home, you mean that you can do it for a very long time.
#1 - My girlfriend was talking on the phone with her sister until the cows came home last night!
#2 - They could argue till the cows come home and still not reach an agreement.
#3 - You can keep talking till the cows come home, but you'll never persuade me to go with you!