Dreaming of a toilet means a release of all your raw rage and emotions that have been pent up for a long time. The person on the receiving end is not going to enjoy the barrage of profanities and cussing that accompanies the release.
The toilet also represent a place of self healing where your body excretes the processed end products, and poisons from your body.
The dream may be revealing a need to let go of emotional baggage or negative thoughts. You may be feeling overwhelmed by negative feelings and be seeking a way to release them.
Flushing a toilet in a dream may be highlighting a need for emotional or psychological cleansing. You may be feeling a sense of shame or guilt and be seeking a way to purify yourself of these feelings.