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A 3D shape that looks like a stretched-out oval, but also like a tiny cock that somehow fits in your nose and your mom's vag.
My math teacher drew one on the board and said it looked like my cousin's penis after he ate a whole pizza.
I tried to fit one in my nose and it came out my ear. My brother laughed so hard he peed his pants.
My mom said it looked like my dad's penis after he drank six beers and cried at a commercial.