Until the cows come home

    很久

    A: When are we going to eat dinner?"

    B: Not until the cows come home, kid. Do you have any idea where your mom is?

    Note: This idiom means "for a long but indefinite time." Cows are notoriously languid creatures and make their way home at their own unhurried pace. The precise time when this colloquial phrase was coined isn't known. It was certainly before 1829 and may well have been in Scotland. The phrase appeared in print in The Times in January that year. Groucho Marx used it in his dialogue of the 1933 film "Duck Soup": "I could dance with you till the cows come home. Better still, I'll dance with the cows and you come home."