Apes that are totally in your face. By way of metonymy, someone may also be said to act like a like an ape by getting all up in your biznitch.
The term is also used occasionally via typos, most commonly when someone adds a space too hastily when trying to write 'face rape', leading to major interweb confusion.
"Stop being to total face ape, dude!"
"Could you please be so nice as to keep your facer ape away from my face?"
"The facer ape, a mammal indigenous to the urban jungle, is known to be a curious creature, socially preferring light teasing to traditional monkey-like playfulness, which is often misconstrued as lack of respect for other mammals' private sphere".
"Did you see that? He was acting all, like, crazy, running around like cracy and acting like a total facer ape".