Green’s Dictionary of Slang

bingo wings n.

[the image of an old lady waving her arm to signal a ‘full house’ in a bingo hall; but also var. on batwing n. (5)]

upper arm flab.

2002
20102020
2023
[UK]Guardian G2 28 June 5: Tuesday was the usual trip to the gym, to work on the ‘bingo wings’ — the attractive upper-arm bit that wobbles when old ladies wave and shout for a full house.
[UK]Observer 1 Feb. 11/2: This ‘better a tumour than a bingo wing’ attitude.
[Aus]T. Spicer Good Girl Stripped Bare 173: I didn’t turn on the news tonight to see exposed flesh. Why don’t you women cover your arms? It is most undignified. (And this was before the bingo wings.).
Twitter 30 May 🌐 What idiot called them bingo wings instead of rubbery underarms?