batwing

/B AE1 T W IH0 NG/
noun
  1. 1

    The wing of a bat, or its shape.

  2. 2

    Several South or Southeast Asian species of tailless dark swallowtail butterflies in the genus Atrophaneura.

  3. 3

    An area of flabby fat under a person's arms.

  4. 4

    A long sleeve with a deep armhole, tapering toward the wrist.

adjective
  1. 1

    Shaped like the wing of a bat.

Source: https://en.wiktionary.org/wiki/batwing