Wikipedia

In the United Kingdom, the game is sometimes called High Cockalorum, but has a large number of different names in various local dialects. These include: "Polly on the Mopstick" in Birmingham, "Strong Horses, Weak Donkeys" in Monmouthshire, "Hunch, Cuddy, Hunch" in west Scotland, "Mont-a-Kitty" in Middlesbrough, "Husky Fusky Finger or Thumb" in Nottinghamshire, "High Jimmy Knacker" in east London, "Jump the Knacker 1-2-3" in Watford, "Wall-e-Acker" or "Warny Echo" in north West London, "Stagger Loney" in Cardiff, "Pomperino" in St Ives, Cornwall and "Trust" in Lancashire.

How is the UK so good at making up ridiculous names for things.

There are some meme-worthy images in that article. I wish I was creative.

One version of the game is played when "one player hops onto another's back" and the climber guesses "the number of certain objects out of sight".

Another version of the game is played with "one group of players jumping onto the backs of a second group in order to build as large a pile as possible or to cause the supporting players to collapse."

As someone who has never heard of this before the article does a terrible job of explaining what it is or how it works