The equivalent of "Smack Wally". An alternate form of the "Spot the Pony" title of features in young girl's annuals.
Doon MacKichan: "At first we called it Spot the Pony because that's what you have in those young girls' annuals. Then Kevin Lygo suggested Smack the Pony... People think it's a reference to something sexual but in fact it's a made-up thing."
A trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.