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1.
1. To kill and cannibalize someone with extreme prejudice; the act of devouring a human being, particularly while they are alive and then drinking their body fluids (especially their semen).

2. To kill without remorse, often during a fit of rage and in a robot like state.
Man, that Jeffrey Dahlmer pulled a Jachymek on those poor unsuspecting street kids. What a way to go.
by gord d'amato December 13, 2007