Potvaliant(valiance) [noun/adjective] : To have courage because of intoxication. Or the courage that comes from strong drink.
Potvaliance was one of the first words which cued me in to this hidden lexicon.
It also ties in with the word that I penned: digivaliance(valiant) which is simply to have/or/ the courage due to of the internet’s anonymity.
Kacirk, Jeffrey. The Word Museum: The Most Remarkable English Ever Forgotten. New York: Simon & Schuster, 2000. 145. Print.