Definition of "Paddy"

...He jumped into the water as frisky as a whaleSwam around the U-boat wagging his little tailHe upped with his horn and he stuck it in the boatAnd sent them all to Heligoland did Paddy McGinty's goat...

1917, Bert Lee et al., Paddy McGinty's Goat

It is in this context of Irishphobia that the racist caricature of the drunken, violent, ignorant Paddy was established.

1996, Pierre L. Van Den Berghe, Ernest Cashmore, Ellis Cashmore, Dictionary of Race and Ethnic Relations, page 182