I'm undecided between Bud Dry and Bud Ice
Of course you'll all remember BUD BOWL IV (1991) - Budweiser 38, Bud Dry 6.
The game long termed as "The Tidy Bowl", fans in the metropolitan St. Louis area were outraged when NBC executives cut away from the action to run promos for the upcoming premiere of "Reasonable Doubts" starring Mark Harmon & Marlee Matlin. The game was a blowout, with newcomer Bud Dry unable to recover from a Bud Bowl record of seven turnovers. Several Bud Dry bottles admitted later that they came out "flat" due to some equipment snafus involving improperly tightened bottlecaps.
But who can forget the pitiful defense demonstrated by Bud Ice in BUD BOWL VIII (1995 - Budweiser 51, Bud Ice 24)
Ultimately I guess you have to credit Coach Budka for motivating his team with bulletin board fodder of quotes from Bud Ice players joking about "beachwood aging." The game wasn't even as close as the score would indicate. There was also that scary moment of tragedy when several Bud players had to be hospitalized after spraying beer wildly after their signature "cabbage patch" endzone dance.