ancient as the hills

(as) ancient as the hills

humorous Very old. Oh, she's ancient as the hills, she can't hear us. Why don't we ever sing new songs? Those hymns are as ancient as the hills.

See also: ancient, hill

ancient (or old) as the hills

of very long standing or very great age.

Hills are used in the Bible as a metaphor for permanence.

See also: ancient, hill