A British drinking game
, usually takes place in a park or at a festival, where toilets are far away. Involves each person drinking 8 pints of beer without urinating
throughout; the idea being that there are on average 8 pints of blood in the human body, so after 8 pints of beer without any coming out you're half-man half-beer.
Grab some tins, we're going to Hyde Park to do Half-Man.