Caitlin from Dallas, Texas, says that her family always referred to jiggly underarm skin as flying Bettys. They’re also known as bat wings, bingo wings, Hi Bettys, and Hello Helens. In German, they’re Winkerarme, or “waving arms.” In Brazil, they’re...
bat wings n.pl. flabby undersides of the upper arms; untoned tricep muscles. Editorial Note: A synonym is bingo wings. (source: Double-Tongued Dictionary)
