A rave name given to a male. 'Fag' usually deriving from the fact that he is gay. The suffix 'achu' derives from the Pókemon Pikachu. The 'achu' can mean to say that the gay is as annoying as Pikachu, however, it is also said to mean that the male is as cool and 'rave-like' as Pikachu.
"Hey, that guy over there, what's his name?"
"Oh, thats Fagachu!"
"Heyya Fagachu...what's up?"
"Faga Faga!"
When something, someone, or someplace is incredibly gay. Similar to the word capacity in that there is a point where something reaches it's maximum as there is a point where something is so gay that is has reached it's fagacity.
"Yo I had a dream that i was swimming in a pool full of Justin Biebers."
"Damn that pool has definitely reached it's fagacity."