Also known as Seb, is a nasty combination of the worst things ever created. They smell, are full of themselves, bad a sports, curse a lot, and remove themselves from any social contact whatsoever. He thinks he can get any girl he wants when really, when they see him, they run away screaming. Sebastians are really ugly and have a bad laugh, smile, and body. Dont get too attached because they get kicked out of every school they go to. He is a nasty bitch that lies and is a piece of shit. Stay away...
What is that thing?
-- Oh, its a Sebastian.
by Curly Cue June 20, 2014
Also known as Seb, is a nasty combination of the worst things ever created. They smell, are full of themselves, bad a sports, curse a lot, and remove themselves from any social contact whatsoever. He thinks he can get any girl he wants when really, when they see him, they run away screaming. Sebastians are really ugly and have a bad laugh, smile, and body. Dont get too attached because they get kicked out of every school they go to. He is a nasty bitch that lies and is a piece of shit. Stay away...
What is that thing?
-- Oh, its a Sebastian.
by Curly Cue June 20, 2014
A very fat oompa loompa who speializes in giving hand jobs and suffers from athletes foot. This creature also enjoys having grenades up the ass.
I'm gonna pretend to be a Sebastian today!
by Report Worthy September 19, 2012
Sebastian is a guy that is very fucking annoying. He enjoys flirting with every girl and barely has any guy friends. He enjoys piercing people with his beautiful blue eyes that I'd actually like to puncture with a stick. He steals people's phones and abuses them because he thinks it's funny. He's a badass that gets suspended from school and he makes sure he smokes at least 2 packs of cigs a day. He acts like your friend for awhile, then leaves you in the dust. He's dated at least 23 girls since middle school and you could consider him a huge whore that is just trying to get some.
Look at that kid over there near all those girls. He's being such a Sebastian.

He is stealing her phone again?! What a Sebastian!
by whoeveryouwantittobebitchess November 23, 2011
the lankiest most hairy italian ever
wow that guy is a real sebastian
by mee44 February 24, 2010
The real defenition of sebastian is one's true boyfriend and lover but if he is not treating you rightly, one must break up with him because you would be lying to your soul and heart. sebastian is a man who usually falls in love with alexia's who are always confused between their relationship and do not know what to do.
Why would some people like a sebastian, although alexia has been waiting for him for 5 years!
by -Urban Dictionaryyy April 26, 2009
The real defenition of sebastian is one's true boyfriend and lover but if he is not treating you rightly, one must break up with him because you would be lying to your soul and heart. sebastian is a man who usually falls in love with alexia's who are always confused between their relationship and do not know what to do.


Why would some people like a sebastian, although alexia has been waiting for him for 5 years!
by -Urban Dictionaryyy April 26, 2009

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