1) To tackle, preferably off a bicycle, a hefty woman who is breast feeding and while she is defenseless, go in for the kill and feed off of her via drinking her breast milk. The term is derived from a scene in, writer and director, Jerzy Skolimowski's, 2009 film, Essential Killing, which tells a story of an escaped Taliban fugitive in the Polish Forests.
2) To forcefully drink a woman's or man's breast milk from the victims nipples.
I was jumped last week by some street urchins and they milk raped me.
A name given mainly to European women who frequent the sunny beaches of the Carribean, looking for an exotic shag by Jamaican 'Rastatutes' (Rastafarian statutes: built-up sex-industry workers), to denote their horniness (they resemble empty milk bottles waiting to be 'filled' with 'white'... uh, man-milk!)...
Britishmilk bottles are dime-a-dozen on Seven Mile Beach whenever the tourists' season starts in Jamaica!