I wouldn't overthink it. It's "parody German": a hot dog slinger but "Germanized", if you will, to be funny

> When he was a standup comic in Los Angeles, Omapod host Tony Bock used to do a bit about the name. “Just saying ‘Der Viener Schlinger’ on a comedy stage gets a laugh, whether you’re in Nebraska or not,” he told me. “There’s something quintessentially Nebraskan about mustering the courage to solve the problem we faced before the advent of this invention: the inability to ‘schling’ the wieners.”