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1.
When being shot at or killed from behind in FPS games. An extremly annoying feeling when a player who is a rookie or a pussy sneaks up from behind. Very often cause for raging and rage-quiting if done frequently.
Josh (monologue): You fucking pussy! That's a back-rape! Face me like a man, you fucking back-raping ape!
by FridgeMidget December 02, 2013
 
2.
When ever you are sitting down, and someone walks behind you and hits your back. Happens in very large, crowded areas. Pertains to mainly cafeterias.
I've been back raped 4 times now. That one girl won't stop getting up and sitting back down.
by pleasestopthenoises April 30, 2009