snoozer

plural snoozers

1. One who snoozes; a sleeper.
2. colloquialSomething that is boring, uninteresting or unremarkable; something that would tend to induce sleep.

   The program is usually pretty good, but last Wednesday's episode was a real snoozer.

3. UKobsoletethieves' cantA thief who steals from hotel rooms while staying as a hotel guest.

   2023, Adrian and Dawn L. Bridge, Manchester Murders and Misdemeanours A snoozer, though, was a criminal who focussed exclusively upon stealing from hotels. Snoozers were looked upon as being the aristocrats of the criminal world during much of the nineteenth century.

   1 more example

   […] a "snoozer," or one of those thieves who take up their quarters at hotels […]

   1862, Henry Mayhew, London Labour and the London Poor, page 242