adj. A phrase that is used to describe a person, place or thing that is not good, but not bad.
1)Andrew: Damn, look at that mean ass chick over there!
Me: Dude, that chick is so average.
Andrew: Why did I even ask you, your gay.
Me: And your into butterfaces.
2)Jared: That club we hit up last night was so average.
3)Me: Shit, this $250 graphics card that just got is so average! : (