Alpacack
An alpacack, sometimes said alpacuck ( not to be confused with Alpha cuck is a person trying to appear alpha so much that he just ends up looking silly, as if trying too hard.

An alpacack will often reject any past-times, hobbies and careers that do not 'look alpha' or 'manly' religiously and will often shame any men who don't. For example, an alpacuck will shame a man for enjoying video games and tell him to start backpacking, skying or mountain climbing instead.

A person who tries too hard to look alpha. A phony alpha.
Alpha 1: Hey dude, let's invite Chad to the club and go picking up chicks.
Alpacack: Nah man, Chad plays video games, he's lame.
Alpha 1: Bro wtf, I play video games.

Alpha 1: Hey dude, let's invite Jerry to hang out with us.
Alpha 2: Nah man, he's just an alpacack. He'll just want to talk about how "alpha" he is all the time.