Use of words for human/animal waste.
I discovered (10 years late, apparently) the XKCD color survey and the (honestly, unsurprising) scatological bent the Internet takes towards some greens and browns. Pretty amusing. Accidentally discovered this grepping for swear words before pushing code (I tend to use such words for debug variables on long nights.) "baby shit brown" #ad900d gave me a giggle.
There's also "piss yellow" #ddd618 and, strangely,
"poop brown"
"shit brown"
"shit"
"poo brown"
all different colors. 🤔
Survey results where this comes from, in case you also had never heard of this: https://blog.xkcd.com/2010/05/03/color-survey-results/