To do a sebastian

To masturbate in public bathrooms

He tried to do a sebastian but was caught by the teachers

by @mrkulci September 4, 2018

Sebaston

Awesome the best friend you could ever ask for never leave him and very very very very nice and loving

This man is a Sebaston

by Seb is. Good person January 30, 2017

Sebastian

Two words, ... Big Cock

“Hey look, he has a BIG COCK, he must be Sebastian.”

by Javauusgsysgvshavzbs June 11, 2018

Sebastian

Where do you start? Sebastian is a head ass boy who typically can be located in the United States or Europe. He looks like the old man from Up. But, hear me out... built like the boy scout dude. His workout routine involves beating his meat with a water bottle. Yes, his chode fits. Then, he goes to the gym and swims like a cebas. In conclusion, Sebastians are head asses.

Stephany: Yo, is that Sebastian.
Sebastian: Si, yo soy bebe. Come to me ;)

by GeorgeWBushRightOnHerCatYah May 31, 2018

Sebastian

A legit Manwhore. Dude can have sexual intercourse with anybody and he don’t care. He could have herpes, aids doesn’t matter, he still gonna be fuckin’. Overall he’s pretty kewl.

Fag 1: bro, Imma Sebastian dude.

Fag 2: What!! Brooo no you’re not. I don’t think.

by Booty Eatin’ Bandit October 30, 2018

Sebastian

Stupid, and tall and skinny. Will SCREAM your name randomly and terrify you. He is a big rat. I am lil rat.

He is still funny though and will go to any movie you force him to.

SCREEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEECH down hallway
You: oh, it's just Sebastian.

by MadHatter8925 April 25, 2019

Sebastiao

This motherfucker is a player. He will try to get every girl on the block, but he will get rejected (multiple times)

"He asked me out, but I can't say yeah. he's such a Sebastiao"

by shitdip May 15, 2019