In the
furry fandom (and most likely other places with sexual minorities), hyper means to be excessively
endowed to the point of ridiculous and
unrealistic proportions. This can also be combined or replaced with the muscle fetish to mean unrealistically gigantic muscular proportions.
Furry #1: "Hey did you see the artist who drew that
hyper mouse?"
Furry #2 "The one with those really really
huge boobs, right?"
Or
Furry #1: "Man, I wish I was hyper muscled..."
Furry #2: "Why? You wouldn't even be able to move with all that beef on you."
Furry #1: "It's just for looks."