When two people are in a relationship that they are extremely unsure about and won't admit anything to their friends about where their relationship is going.
Often times roommates will plan their night around hanging out with their "quasi" so that they won't jeopardize friendships including bromances.
Dave: "Yo Bro, what you up to this week man?"
Brian: "I'm hanging out with the quasi on Monday."
Dave: "Waaa, allright bro I guess that I will plan something with my quasi on Monday so that we can bro-out the rest of the week"
when someone is completely wasted that he/she ends up looking like Quasimodo from the Hunchback of Notre Dame. This look is often characterized by one eye shut and hunching over (maybe a little drooling, too)
Girl 1: I tried calling Brett last night so we could meet up... I called like 5 times.... He answered once, but all I heard were grunts and heavy breathing.
Person who's faking his ability to do something. He may know some basic things but in reality he has no idea what he's talking about or what he's doing.
#1.
He keeps talking about Nietzsche even though he has n idea what's his philosophy is about.