A 21-year-old New Zealand woman was sentenced last week for 16 months in jail for her part in an attack that left a man unconscious with a swastika scratched into his buttocks.

Briana Rose Murray, who fell in with members of the skinhead community of Christchurch, New Zealand, told the court that she had been drinking with fellow skinheads when the innocent occurred.

Murray and two others attacked a 23-year-old male, stomping on his head up to 20 times and carving a swastika into his buttocks with a screwdriver.

When the man regained consciousness, he found his pants pulled down and someone scratching his buttocks.

The victim suffered blurred vision, a swollen jaw, chipped teeth, cuts and psychological damage.

Murray has been jailed for assault and must pay $8,810 in fines.