"Pikey"?
"You rarely hear abuse like "n*gger" or "queer" shouted at Premier League [soccer] players any more, for fear of crossing the line. (At least one manager is often slandered as a paedophile, but that's another matter.) However, Arsenal fans near me had no compunction about loudly branding Wayne Rooney a "fat pikey" throughout - now a non-playful but apparently acceptable term for white working-class.
Source
Wikipedia has more details. In Australian slang, a "piker" is someone who does not keep his promises or honor his obligations.
