An insult hurled at new zealanders, by australians mostly. it is a reference to the sheep prominence in new zealand- ten sheep to every person. sheep cant breed that fast on their own, so the "sheep shaggers" help
Any person from wales, new zealand and especially Derby. Any derby county fan is a sheep shagger. They like making love to those wooly bastards.
Used mainly by Nottingham Forest fans agaist the derby sheep shag scum.