A racial slur towards an Irish-Italian person.
John is a McGuinea. He is Irish and Italian.
by firstname.lastname@example.org February 04, 2005
A person of Irish (Mc) and Italian decent (Guinea).
Giuseppe O'Sullivan is a McGuinea. His Father is Irish and his mother is Italian.
by Coolie71 September 28, 2010
A McGuinea is a cross between being Irish and a guinea. Not to be taken as a completent becasue who would want to be Italian. I mean come on forget about it.
To drunk for his own good an irishmen boned a guinea and 9 months later a McGuinea poped out.
by Smokin mad newports January 06, 2010