potato, potato : interjection (patati, patata “ noise what do the paws du cheval galloping” from patt- evoking a coup, shock).
“Pata! and potatoes! is a familiar onomatopoeia that evokes a long chatter (like: blablabla).
– Quote from the writer Alphonse Daudet (1840-1897): “How is he? What is he doing ? Why doesn't he come? Is he happy? […] And patati! and potatoes! Like this for hours”.