As a Noun:
1. In rugby, either of two players who pack down on either side of the back row in a scrum. English = breakaway. British English = flanker, wing forward.
As a Verb or Adjective:
1. Either of two players who pack down on either side of the back row in a scrum, to get the ball, break from the scrum, and run towards the opposing goal. English = break away.