Someone who shows up to every social event without actually being invited. Although not particularly hated, most people would prefer it if they weren't there.
A specific variation of freshman boy, most commonly falling in the "Debate Trash" category. This kind of freshman boy commonly enjoys giving out insults which are most likely a legitament problem of their own. Often uses excessive profanity to prove their point. This type of person is also very hypocritical in the sense that they would for example: call someone a fag and tell them that they are homophobic.
The word 'crust' has several meanings. It means a person, Whom can spend hours on end in a bed, On a couch etc, Watching a marathon of a TV series or movie, Like Law and Order or The Simpsons or even for a movie Snakes on a plane. A crust is a person who enjoys a take away greasy meal rather than a nice home cooked meal. Or it can be used to refer to doing all of the activities above.