wing back

noun
  1. 1

    A player who doubles as a defender when their team is defending, and a winger when they are attacking.

  2. 2

    A running back who is in formation near the line of scrimmage and outside the tackles, a slotback.

  3. 3

    A wingback chair.

Source: https://en.wiktionary.org/wiki/wing%20back, https://en.wiktionary.org/wiki/wingback