donkey's ears

donkey's years

A long time, years and years.

four score and seven years ago

Used (sometimes sarcastically) to indicate that a past event being men…

until the cows freeze over

For a very long period of time.

effluxion of time

The determination of a term of years due to the passage of time, rathe…

it's about time

Used to express impatience at the eventual occurrence of something tha…

have legs

To have endurance; to have prospects to exist or go on for a long time…