this is a game played with two alcoholics trying to get drunk with eachother. One person buys two shots for the two of them, then the second person buys two shots. This continues until you are sufficiently drunk or blacked out preferably
To fail suddenly, unexpectedly and humourously without you or other surrounding parties initially realising your mistake.
*Following a breif period of silence where it dawns on everyone what an idiot Robin has just been*
Stu: Hey man, you're an idiot, you shot a cow on that one!