A toilet dream is very common and is read as the need to let something go in private. Not finding one traditionally stands for having no space of your own. A toilet with no walls or in a public place is one of the classic versions, read as fear of exposure or of being seen at a vulnerable moment. A blocked or overflowing toilet points to feelings that have been held in too long. Queueing endlessly suggests putting your own needs last. Dream books read the scene as emotional release, with nothing shameful about it.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.