I tried goggling, and found nothing usable. So…
Granny(Beverley Hillbilly’s) uses the term Goomer (unsure if spelled correctly) all the time. I always take it like a “Gomer” . Problem is Gomer is a biblical name and the “Goomer” Granny uses predates Gomer Pyle.
I always thought is was goober, another name for a peanut.
I thought so also, then after paying closer attention I believe the word she is using is “Goomer”:dubious: