ain't = don't

[Jonathan Lighter]

This is surprisingly early and evidently not BEV:

1918 Alter Brody _A Family Album and Other Poems_  (N.Y.: Huebsch) 88: They
ain't know nothin' - nothin' about me leastways,/ Give me some dope for my
nerves!
JL
--
"There You Go Again...Using Reason on the Planet of the Duck-Billed
Platypus"

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