Any drinking/card game purist knows that
@sshole is the Cadillac of drinking games.
Accept no substitutions my friend..
I realize that it's not hold 'em based, but I haven't found any hold 'em drinking games that were worthwhile, you might as well high card for drinks or just take turns chugging.
@sshole at least takes a modicum of skill, plenty of laughter is guaranteed to ensue and it's easily modifiable for personal rules (drink/drank/drunk, thumb rule, waterfalls, eye contact, first names, swearing, etc..)
Drunken hilarity is almost guaranteed to ensue.