A person that is the complete definition of bottom, who's mere existence is the evidence providing the necessary proof. They are commonly known to be 'trying' to proof how much of a top they are, though everyone knows it was and always will be a false claim. They also have a lot of kinks and deep throat a lot of things. (E.x: Trees, Hairbrushes, Toothpaste tube).
But everyone sill loves that bottom of a person in their own way.