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1.
(v.) A word used to describe the action of killing a friend or teammate in any video game, regardless of whether it is accidental or intentional.

see also: team killer
*James fires an RPG at Mandy, but misses and accidentally frags his friend, Armando*

James: Sorry!!!
Armando: OMG, HOMIECIDE
*Mandy snipes James*
Mandy: LOL!

Homie+cide=Homiecide...get it? =]
by Uno Carb August 18, 2007
 
2.
To Kill Someone wearing the same color clothes you're wearing.
The only clues we have now is he was wearing red clothes, maybe it was a homiecide?
by CanadMan7 May 09, 2012