Rogaton : nm fam. (word from latin rogate, terminal meaning "to ask").
Snatch of food; rest of a meal (especially in the plural.).
He dined on a few old rogatons. She left us nothing but rogatons.
"These old men who are rolled around, mitouflés, uric rogatons, arthritis patients on crutches" (Céline, Fairyland for another time).