What is Sleep in British slang?

"Sleep" doesn't have a specific, established slang meaning in British English. It's typically used in its standard sense of resting and being unconscious.

However, depending on the context, you might encounter these related slang terms:

* "Have a kip": This is a common British slang phrase for taking a nap.

* "Get some shut-eye": This is a more general phrase for sleeping, but it can also be used in a slang context.

* "Hit the sack": This is a more informal way to say "go to bed".

* "Go to bed": This is the most common and straightforward way to say "go to sleep" in British English.

So, while "sleep" itself isn't slang, there are many slang terms and phrases related to sleeping in British English.