until the cows come home
For a very long period of time.
You can crank the engine until the cows come home, but it won’t start without fuel.
ADJ.
ahead, alcoholic, better, blue, closed, done, finished, impossible
The restaurant stayed closed until the new owner finished renovations last month.
VERB + UNTIL
appreciate, begin, continue, document, doesn't, eat, eyes, go
We continued until we reached the top of the mountain just before sunset.
UNTIL + NOUN
friday, it's, peace, rescue, summer, team, th, week
We can't go to the beach until summer arrives next year.
PREP.
after, in, off, on
We waited in the station until the train arrived on time.
ADV.
abroad, skywards, theoretically
She hadn't travelled abroad until she turned thirty and saved enough money.