Did either of you have relatives from the greater Philadelphia area? I grew up there and "warsh" was widespread, even leading to the pronunciation of our capital as "Warshington". Other strange Philly pronunciations are "wooder" for water, "crown" for crayon, and "Iggles" for the city's beloved Eagles.
I was never around people who said "warsh" growing up, but I've heard it a bit. Angelo Cataldi on WIP pronounces it that way, but he is not a native Philadelphian. He's from Rhode Island, and it's apparently quite common up there, too.
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