Game played with two teams of four or five. One team would pick a password or phrase, and then peg it off. The other team would hunt down the opposing individuals, catch them, and beat the password and shit out of them. Two matching passwords from two (usually badly hurt) individuals, and the game was won.
Often phrases like "fuck your mum" were chosen by the running team - knowing that the weakest and saddest members of the team would get caught first. The only way they would therefore be able to stop the beating is by shouting “fuck your mum” at the attackers, which obviously sounded more like a spirited defiance, and left you five times likelier to get your nose broken.

Also the name given to a retaliatory attack following a fart. A cry of 'beats!' would be the call to arms for those nearby (the ‘fartees’) to quickly deliver painful blows to the farter's face, chest and lower torso, and so the previously disrupted moral equilibrium of the playground was restored (although the amount of 'beats' were probably never entirely proportional to the offensiveness of the fart).

More devious students would carry out controlled, easily transferable farts in the company of an individual for whom they concealed intense and sinister hatred. This would allow for a beating to be administered without revealing any dark, evil intentions/repressed sexual feelings to the victim.

In Croesyceiliog School during the 60s and 70s retalliation for guffs took the form of shouting "Sixes!" and raining blows down on the farter. UNLESS, that is, he or she had immunised themself from the violence by shouting "Taxi!" immediately post-chuff. Insofar as I can remember, said protection was strictly observed, although no taxis ever actually turned up. Tuh, taxis, eh?