The term originated in the US (1860s) and refers to the members of the American branch/chapter of the Irish Republican Brotherhood founded in Ireland. For Irish-Americans, the term signifies respect, loyalty and love for ones heritage. It is the highest honor for an Irish-American to be referred to as a Fenian or a “Fenian Son”.
He’s no Plastic Paddy, he’s a real Fenian Son.
by JJ Smith February 8, 2008
Get the Fenian mug.
Also known as the Fianna, a brave group of celtic warriors of olde who were led by the Irish Hero Finn Mac Cumhail.
The Fenian warriors were not to be trifled with.
by GueethePagan April 16, 2005
Get the Fenian mug.
Bravest Irish men who ever lived
The Fenian men fought until not a one was standing
by Wilhelm January 25, 2004
Get the Fenian mug.
Something that is used to describe an Irish man but Glasgow celtic (British) fans like to pretend to be
THAT British club Celtic like to think they are Irish Fenians but they are British as Brixton
by Order number 1690 November 29, 2021
Get the Fenian mug.
Used by people not living in Ireland or Northen Ireland to offend the inhabitants. If the person being abused is a Catholic then he will be offended that someone not of his blood is calling him thus and is most likely to twat the offender. If aimed at a protestant (usually from Northern Ireland) then he will be vexed by the fact he is being compared to a Fenian and is most likely to twat the offender.
See you fenian cunt, i'll cut you first!

Nice on nancy, cop a load of this!
by Rikki Sixx February 19, 2005
Get the Fenian mug.
The Fenians were members of the Irish Republican Brotherhood (IRB) in Ireland in the 1860s. They are essentially the pioneers of modern terrorism, and used violent methods in order to gain what they wanted - in this case they wanted Ireland to be made a Republic, separate from Britain and with their own Parliament.
Members of the Irish Republican Brotherhood were Fenians.
by oreosandlemons October 22, 2014
Get the Fenian mug.
A word that describes Irish Catholics, or Irish American Catholics, who are mostly Irish Republican, native to Ireland, and are Catholic. Fenian can be used as a slur to insult an Irish Catholic for their struggles in the Troubles in Northern Ireland, being discriminated against by the Loyalist Protestants who hated Irish Catholics.
"Good old Jimmy boy is a real Fenian boy"
by Washougal Bhoy November 7, 2015
Get the Fenian mug.