As old as the hills

Pro Tip 1/3

Hyperbolic idiom

Used to exaggerate age, showing something is extremely old or outdated.

That type of phone is as old as the hills; you rarely see them anymore.

Pro Tip 2/3

Humorous undertone

Often used humorously to describe something amusingly out of date.

Grandpa's jokes are as old as the hills, but they still make us laugh.

Pro Tip 3/3

Not literal

Doesn't mean literally as old as hills; it's a figurative speech to stress oldness.

This textbook is as old as the hills, it's time for a new edition.