noun. Not as cute as smurficide.
Real citation: "Is the murder of an infuriatingly useless co-worker 'colleague-icide' or supporting 'work life balance'? Something to ponder, y'all."
(Oct. 21, 2009, Raynor Blazely, Twitter, http://twitter.com/raynie/statuses/5063717021)
Made-up citation: "One of the most common workplace hazards is colleague-icide; also, many employees fall in vats."