The act of drinking 4 pints of beer/lager/stout in one session without going for a piss. If you drink 2 pints, but fail to drink 2 more, you have done a Half Craven. Named after the urban myth that T.V. presenter John Craven can drink four pints without taking a piss. Those who complete a Full Craven will be the envy of all of their friends and will be a real man.
3 pints without going for a piss. 1 more and I've done a Full Craven.