The "r" in "warsh" is a so-called intrusive R.
An "r" added to the end of a word followed by another word beginning with a vowel - as in "I sawr a film, oh boy" - is called an epenthetic "r."
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Regards,
Thanks. Good to know. I had no idea those misplaced “r”s had names.
What about “sammich”? I can’t convince my wife it’s SAND-wich.