Green’s Dictionary of Slang

mixed-ale oration n.

[the assumption is that the speaker is drunk or may as well be so]

a poor political oration, typified by its illiterate use of the language; thus mixed-aler, mixed-ale philosopher, a drunken know-it-all.

[US]C.L. Cullen Tales of the Ex-Tanks 45: All the tall chap was good for was to take punishment, and he could beat any mixed-aler at that that I ever saw.
[US]J.M. Sullivan Criminal Sl. 16: Mixed-ale oration, a cheap political harangue containing bad English grammar. Mixed-ale philosopher, a drunken know it all.