A Midland American Englishpronunciation of “wash”. This pronunciation is referred to as the “intrusive R” common in middle America. Contrary to popular myth it’s not common is Southern American English.
How people on the Jerry Springer show say "wash" and don't know any better.
"Wash" rhymes with "Posh" and "Mosh," not "Harsh" or "Marsh" or how Goofy says "Gosh" which is "Garsh!"