A serious form of narcissism. To
act as if one is an important
person without actually doing
anything worthwhile to prove it, thus making one look like a complete tool.
Sometimes abbreviated as USI.
Idiot: Hey guys! I just put up all these sweet pictures of myself on Facebook, and I've got this vlog that you've gotta check out. If you don'
t, you're clearly some kind of lesser being, 'cause
everyone loves me for no reason!
Smart
Person: Sounds like unwarranted self-importance to me.