until the cows come home

For an eternity

Until the cows come home means for a very long time, perhaps indefinitely.

The expression evokes the leisurely pace at which cattle return from pasture at day's end, unhurried by any human schedule.

It typically emphasizes futility or persistence: You can argue until the cows come home, but I won't change my mind.

The phrase often carries a note of exasperation, suggesting that whatever is being done will accomplish nothing no matter how long it continues.

Related

wait forever · keep going · stick it out · endure · persevere · perpetually · hang in there · stubborn as a mule · when pigs fly · till the end of time · world without end · without limit · interminable · drag on · stay the course · plow ahead · push through · marathon

Opposites
temporal duration

until the cows come homebriefly

In few words

for a moment · momentarily · in a flash · in no time · fleetingly

Family

until

Familiarity
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Used worldwide · Timeless · Everyday, not technical · Rated G