jack-rolling 

it is a south african slang term for "Gang-rape"

hey, you missed out on some jack-rolling last nite at the party

jack-rolling by beevisandbutthead December 11, 2009

jack rolling

This is the name applied to a crime born in South Africa's townships where men gang-rape their victims in retaliation for a perceived slight.

Women in the Midlands town have been urged not to go out alone after dark due to a wave of so-called "jack rollings".

jack rolling by Dave Eietz September 5, 2005