A square turd. A rectangular prism of a hearty black turd. It consists of a very rough texture. It is usually painful and sometines stringy. It pops out slow and hurts for a while afterwords.

You may also be considered a butt block if you are an asshole with a square jaw, face, or if you have a square-like personality.
"After I squeezed out that massive butt block, I had to show my mom so she could take me to the doctor." "I obtained some but damage." "My dog, jerry, left a quality butt block on my nieghbors lawn."
by Madman464 February 19, 2011

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