adj:
a)To continually strive for something or never giving up on a task or idea dispite a lack of co-operation or agreement from other parties;
adv:
b)stubborn despite a lack of co-operation from other people
The word is of rural Canadian origin; rising from the implication that pigs are stubborn, created by student Arron Pritchard to describe Piggy in William Goldings Book: "The Lord of The Flies" in a descriptive essay on the novel.
A Pisswilly is a muskrat-eating, gun-toting son of the South who rarely wears shoes, is banned from most public pools, and who likely rambles unintelligibly for hours about topics you never asked about.
Let’s shag ass out of here, here comes Pisswilly with his nonsense.