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A really cool guy that can chat up the women
Friend: so how was the date last night?

Girl: omg! He was such an Oisín
Oisín by Bigboybonkers69 December 12, 2017
A person who exists. Enjoys bringing people down from the inside and watching as they crumble under pressure. Will do anything to get revenge. Good at decieving others into thinking that s/he is nice
I am an Oisín
Oisín by Mr. Definerd January 15, 2021
Some Irish kids dumbass little brother.
"Oh my God,did you hear what Oisín said yesterday?What an idiot.
Oisín by Dumbass345 May 11, 2020
A person who says he isn't gay even though everyone knows he is gay. They often says they have the power of women on their side but this is not true. They are also shit at Tetris.
"Oisín you are gay. Everyone knows it. You are also shit at Tetris."
Oisín by Thomas the chad April 27, 2022
A person who says he isn't gay even though everyone knows he is gay. They often says they have the power of women on their side but this is not true. They are also shit at Tetris.
"Oisín you are gay. Everyone knows it. You are also shit at Tetris."
Oisín by Thomas the chad April 27, 2022
Oisin is the man.
oisin by Cockballs April 10, 2004
More from Urban Dictionary
A US deep south term for an alligator. Usually used in the Cajun dialect.
Take the big pirogue, I saw a huge swamp dog out there earlier.
swamp dog by Crystal Ambrose May 22, 2006
Word of the Day on October 12, 2026
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