(rugby union) short for blindside flanker, a position in rugby union, usually number 6.''The blindside flanker packs down at the scrum on the blindside.
2011, Septembe 24, Ben Dirs, Rugby World Cup 2011: England 67-3 Romania, However, after an inside pass from Moody to Tom Croft and a surge from the England blind-side, number eight James Haskell was eventually pinged from in front of the posts for not releasing.