The correct anatomical term for the Chocolate Starfish or the Hoop.
The lustful object of desire for all homosexuals (on other men that is).
The lustful object of desire on women for all men who would like to indulge in a bit of Anal in order to win their Brown Wings.
The area of the body on which the fabled hoop dhobie is performed.
A potential hamster cage, where the hamster is allegedly inserted into a homosexuals with the help of a useful tool called an Anal Speculum.
There are other different types of anus, for examples check here or here, for a large anus here.