Definition of "Pat"

I'll do it, sir, by the honor of the Pats, just take your two good looking selves into the garden, […]

1868, Irish Assurance and Yankee Modesty, page 18

The stereotypes of the Irish were more negative. Irish men, the “Pats,” were seen as “always drunk, eternally fighting, lazy, and shiftless.”

2015, David Wagner, Miracle Worker and the Transcendentalist, page 28