Sleep talking is formally known as somniloquy. It is a sleep disorder where a person talks during their sleep without being aware of it. It is considered a parasomnia, which is a category of sleep disorders that involve abnormal behavior, movements, emotions, or perceptions during sleep. Sleep talking can be caused by various factors such as stress, anxiety, alcohol consumption, medication, or other underlying medical conditions. While most cases of sleep talking are harmless, in rare cases, it can indicate a more serious sleep disorder.