What is passageway?

A polite and rather shy way of referring to your anus in a sexually charged context.

Mr. John Doe allowed his Writing Passageway to be widened by his master, in order to help him become a more famous writer.

passageway - meme gif

The rectum. Presumably, this word's etymology originates from the word lavender, meaning "gay" in certain contexts unrelated to violet hues.

Wikipedia is administered by people with a stick up their lavender passageway.

That passageway leads to the ship's store.