bingo wings
noun /ˈbɪŋɡəʊ wɪŋz/
  /ˈbɪŋɡəʊ wɪŋz/
 [plural] (British English, informal, humorous)- long folds of loose skin and fat that hang down from the upper arms, especially of older people
- The exercises will tone your arm muscles and banish bingo wings.
 - Wave goodbye to bingo wings.