Annoying piece of shit. Has a large J-Lo booty that often looks like a girl's ass. Stays up all night playing video games but thinks he's a jock. Comes off as a really cool guy but once you get to see him for what he really is, you will see how big of a douche bag he really is.

Befriends weird people who smell bad and don't know when to shut up when he could befriend the other jocks in school and he could be really popular. Wears tightie-whities but plays them off as boxers. Enjoys bragging about his nonexistant talent and is quite bipolar.
God you're such a Justin, buy some boxers. Damn!
by TuMadre Bitchhh July 23, 2009
The epitome of stupidity and self-centeredness. The Justin tends to love boasting about how amazing he is and how he's better than everyone else, though he really isn't. His large ego makes up for his lack of junk.
'Wow... you're almost as small as Justin!' 'Hey! That's mean! My prick DOES exist!'

'Only Justin can love himself.'
by saveyourscissors June 08, 2009
Another word for a man with a very small penis. It is so small you would explain it as "just-in"
"How was the booty call with that random last night?"
"Let's just say he was a Justin".
by LBG6 March 31, 2009
a complete dick. utter existence is to make you feel as bad as he does. genitalia includes a pussy instead of dick but tries to hide it with a hardcore shitty attitude,
your ex boyfriend has really turned into a justin.

that frat guy acted like a real justin.

you suck, justin.

just what the world needs, another justin.
by raptor4 May 20, 2009
homosexual who sucks dick for free but everybody says no to him because he is fucking retarded and he is so super super gay that he turns gay guys straight believe it
Gay guy:uh i had to turn straight because of that justin uhg
by jcocksucker July 05, 2009
some one who gets mad over EVERYTHING. some one who is a liar and a cheater. some one who cannot keep a promise worth shit.
Ewwww, he cheated on you & then lied to you about it? what a JUSTIN!
by awerty March 23, 2007
The ugliest fucking person ever alive. A man whore and likes to suck cock. They're a fatass who has no friends, and spends all day playing video games. Also, he's so fucking retarded.
Me: Ew, do you see that person?
Josh: Yeah.
Me: Must be a Justin.
by toohot4 u December 13, 2009

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