You serious?
What the fuck? If you're reading a dictionary, I think you know what a dictionary is.
That one Steam award you get when you kill the companion cube in Portal. You know, the one that made MatPat from Game Theory make a video about how the cubes have dead bodies in them.
(also, the actual definition is killing your brother/sister)
Jeff: You get to the part in Portal where you have to incinerate the companion cube?
Brian: Yeah. It's a shame. That cube was like a brother to me.
Jeff: Whatever fratricide is, I don't want any part in it.