be older than dirt

humorous To be very old or ancient. Eh? You'll have to speak up, my dear. I'm older than dirt, so my hearing's not what it used to be. Why don't we ever sing new songs? Those hymns are older than dirt. She had a phonograph when she was a child? She must be older than dirt.

See also: dirt, older

See also:

be (as) old as dirt
no fox given
out of the ark
(Don't ask me,) I just work here.
(Don't ask me,) I only work here.
IMAO
I could tell you but then I'd have to kill you
I could tell you, but then I'd have to kill you
checks notes
Eskimo(s) have (some amount of) words for snow

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