somniloquist
/sɑmˈnɪləkwɪst/
noun
- A person who talks in their sleep.
- As a frequent somniloquist, he often embarrassed himself by revealing secrets in his sleep.
- The sleep study identified her as a somniloquist who spoke clearly during deep sleep.
- His wife, a somniloquist, once carried on a full conversation about pizza while completely asleep.