The disgusted-looking face resulting from taking an unusually large gulp of whiskey. Most experienced drinkers can manage to hold it back, but a less seasoned boozer will break out their whiskey face at even the smallest of sips.
Person A: Hey man pass the handle
(Person B passes)
(Person A takes an enormous gulp of whiskey to look hard, followed by a whiskey face)
Person B: Haha nice whiskey face faggot