Orchestrock is (to put it simply) a combination of Rock instruments (heavy guitar, drums ect ect) played with a live orchestra.
The occurance of this type of music has been rising as of late, and a first example that would come to mind would (at least) be Nobou Uematsu's "Black Winged Angel" with his own band "The Black Mages" for the CGI movie "FFVII- Advent Children".
Hey man, this Orchestrock is amazing!
What the fuck are you?, insane???, Slayer is obviously better :|
Mechame is an abbriviation for "Mecha Anime", used in the context that the said Anime has heavy Mecha/Cyborg influences or that the foundation of the said anime's plot is heavily based on mecha/cyborg related characters.
Hey, did you watch Zone of The Enders Dolores?
Yeah, it was a great Mechame, I would definatly watch it again