drunkenese

(n.) <Capitalized> the language spoken by those who have consumed large enough quantities of alcohol to become legally intoxicated, usually marked by slurring or incomprehensibility of each word spoken

(adj.) of, relating to, or characterized by those who have consumed large enough quantities of alcohol to become legally intoxicated

Had the bum not spoken in his native dialect, Drunkenese, he may have more easily convinced the tourists to lend him a dollar.