"at" at end of sentence

[AAllan at AOL.COM]

Maybe we should remember to cast a glance at the _Dictionary of American
Regional English_ when it's a case of a regional word beginning with a letter
in the first part of the alphabet (and by December, through mid-S).

In this case, turn to volume 1, s.v. "at," def. 4:

"Used redundantly, usu at the end of a _where_ clause. . . . chiefly Sth,
Midl _informal, occas joc or for emphasis_" and then follow a slew of
citations.

- Allan Metcalf