Green’s Dictionary of Slang

1. (US) a soapbox or street-corner orator, a fervent preacher.

1922

Colton & Randolph Rain III 191: You know the old shouter better than I do.

2. (US Und.) a criminal’s girlfriend.

1960, 1975

Wentworth & Flexner DAS 473/2: Some underworld use, c.1920.