U Sub 

Commonly misinterpreted as a method of finding the derivative in Calculus, this is actually the premise of a toxic joke, known as a "deez nuts" joke. Ask a person who does not know calculus to explain U Sub, and when they respond with a question along the lines of "what is U Sub", the setup for the deez nuts joke is complete.

"Hey can you explain U Sub to me?"
"What's U Sub?"
"U Submerged yo face in deez nuts!!!!"

U Sub by MackSneale July 12, 2022

usubis 

Usubis pronounced as ou-su-bis means what are you doing right now but in a new modern way

Me:Yo
You:hi
Me: usubis
You:playing fn hbu

usubis by Itz.carlosssss June 20, 2019