From the uniform of white shirt and shorts worn by the Victorian Football League (which became the Australian Football League) field umpires. The umpires' uniforms changed to day-glow orange in 2004.
white maggot (plural white maggots)
- (Australian rules football, slang, derogatory) A field umpire.
- 2004: Come on you white maggot, that was a throw. — Brooke Neindorf, Country footy