Green’s Dictionary of Slang

augur n.

[a pun on SE auger, a bore; note SE augur, a prophet]

(US) a bore, an excessive talker.

1889
189018951900
a.1904
[UK]Barrère & Leland Dict. of Sl., Jargon and Cant.
[UK]Farmer & Henley Sl. and Its Analogues.