Detonator (game)

It is played across the United States, and supposedly originated among college students attending Gonzaga University.

Players take turns smashing the beer on their foreheads, yelling "Detonator!"

The beer can is then passed to the next player, who repeats the smashing and yelling.

At this point, one player inevitably ends up covered in beer.

This player is declared the winner, and all losers are required to chug a full beer.