The old grammar rule we all obey without realising | The Guardian
The rule is that multiple adjectives are always ranked accordingly: opinion, size, age, shape, colour, origin, material, purpose. Unlike many laws of grammar or syntax, this one is virtually inviolable, even in informal speech. You simply can’t say My Greek Fat Big Wedding, or leather walking brown boots. And yet until last week, I had no idea such a rule existed.
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An O mark, known as marujirushi (丸印) or maru (丸) in Japan and gongpyo (공표(空標), ball mark) in Korea, is the name of the symbol "◯", a circle or used to represent affirmation in East Asia, similar to its Western equivalent of the checkmark ("✓"). Its opposite is the X mark ("✗" or "×").
Balls is the noun, Pig is the origin, Poop is the material. I->A->O applies to the description - [pig poop] - and the order of adjectives applies the same.
It would sound fucking ridiculous - just utterly absurd - if we were to say poop pig balls.