a sociopath who seems awesome at first until he threatens to kill you; a mentally-ill con artist.
i was really into him at first until i realized he was a justin.

i don't trust him, could he be a justin?
by warrierbeans February 03, 2010
a really big douche bag who cheats on his girlfriend and breaks other girls' hearts. what an asshole.
he cheated on you? he sounds like another "justin" to me. what a douche.
by heartbroken111 February 04, 2010
A short, blond musician who also happens to be a leprechaun. He has crazy ninja skills and is a very good skateboarder and snowboarder.
Wow look at that short leprechaun skateboarding, must be a Justin.
by whitehorse101 March 27, 2009
someone who makes out with girls and fucks them and then dumps them.usually does this to about 20 girls a month.
1.)omg becky my boyfriend gave me the greatest fuck last night.
2.)watch out,i heard he's a justin
by vanillaxbabe November 19, 2008
player, acts two-faced makes girls fall for him and acts like a total dick in the end.

usually a baller
nice clothes, not sucha pretty face
katrina: hey justin can I see your cell?
justin: uhhhhh no.
katrina: why ? im your girlfriend ..
justin: oh .. alright , btw while I've been texting and calling that girl you hate everyday but were just friends i hope your cool with that
by thegirlthatgotplayed; February 17, 2009
1. extremely cheap person, uses sheets of cardboard for his bread.

2. Manipulative, especially of the younger ladies.

3. Balder, fatter, less cool, than their older brother.

4. Stool that floats instead of sinking.
I just popped a fat justin squat.
by spartan1234 February 03, 2010
V. The act of taking advantage of a girl who is under the influence of alcohol. Other forms include justining or justined
Friend 1-" Watch out for that kid over there. I heard he likes to take advantage of drunk chicks."
Friend 2-" What a Justin!"
by Montalvo, Kevin April 07, 2009
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