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1.
Someone who has a sociopathic ability to be irresponsible despite overwhelming attempts by anyone to make them a responsible human being.
Britney Spears lost her children and career by persisting in irresponsible behavior despite numerous interventions by rehab facilities. She must be a irresponsopath.
by John R Flanagan October 07, 2007
 
2.
A person that has the psychopathological ability to be remarkably irresponsible. Like a sociopath, this person retains thier irresponsibility despite multiple overwhelming attempts by anyone trying to help them become mature responsible people.
Despite numerous request and generosity by the landlord, he and his family will be evicted even though he was making good money. He must be an irresponsopath.
by Dr John R Flanagan October 01, 2007