caster oil 

Something they use when your pregnant and can’t shit , the put it in your asshole and it slides your poop right out

Use caster oil for her bootyhole she’s not pooping

caster oil by Mariahlynnblondiefan May 5, 2018

castor oil plant 

a plant that makes stinky smegma.

Mike: Hey man, my smegma smells HORRID!

Adam: You dun gone caught yerself a case'a the ol castor oil plant cock i tell you what

castor oil plant by your name is NOT being used by July 13, 2010

casterpillar

A small asshole

They are a casterpillar.

casterpillar by Stonefox23 April 2, 2018