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1.
A unique marketing predicament where a particular brand of a product becomes so common or dominant, its brand name becomes the generic term for the entire product category. Examples include Kleenex, Vaseline, Xerox, Windex and WD-40. Some trademarks have actually lost their legal protection in the U.S, including Aspirin, Thermos and zipper.
#1: "Hand me a Kleenex, would you please? I'm all stuffed up."

#2: "These are Puffs. Shouldn't you say 'facial tissue'?"

#1: "I just say Kleenex for all of them. The brand has committed genericide. Now just give me the damn Kleenex already, my nose is dripping!"
by drm310 May 24, 2011
 
2.
The way people tend to want their homes or clothes to be like everyone else. Lack of individuality or self expression
I was at their new home last night, they committed genericide on their living room.

I just watched HGTV and saw seven consecutive shows committing genericide

They just installed granite countertops, another kitchen gone to genericide
by Joe Incao February 16, 2008