oisin 

oisin can be used to describe someone who is ill-mannered or ignorant of other peoples feelings.
it can also be used to describe how someone acts around others. e.g. lying, deceitful

Another way to call someone in a normal conversation is a snake or a liar.

That guy is such an oisin.

oisin by Izaya.H April 21, 2018

Oisin 

A massive faggot who only talks about himself, his love for dick, and how his name means Little Deer.

"Oisin is a faggot"

Oisin by OisinIsAFaggot February 15, 2018

Oisin 

An annoying Irish ginger cunt who everyone hates

'Oisins in my group'
'oh poor you'

Oisin by Wagwanwhatusauingmyg November 20, 2019

Oisin 

A person who will not date people from 7 country’s and has a genuinely small dick and this is the acto of putting your wang into a mans ass

I like to Oisin with mike

Oisin by Sloppy wang May 7, 2019

Oisin 

A fucking annoying ginger cunt who can fuck of back to Ireland and know body would give a shit as he has no friends and is shit at every thing and his dog looks like a rat and He will cry at everything and will one day be a child molester and will never have any kids or a girlfriend you fucking incel

I heard Oisins in you group

Yh he is

Ah poor you I hate Oisin the dick licking cunt
I’m glad he’s not in my group as I might have to kill my self or him

Oisin by Imapiffting November 21, 2019

Oisin 

A man that goes back to the same girl

Who is Oisin doing tonight

Probably Zoe or Holly

Oisin by Oisin Mogan November 25, 2019

Oisin 

Oisin is the name of a ginger person located in Ireland . He is also well known as a (simp) .

King 1 : wow that guy is such a simp
King 2: yeah he's almost as bad as oisin

Oisin by Mandem king January 26, 2020