What was a Slang for to leave in the

Please clarify your question! "To leave in the..." needs more context.

Do you mean:

* "To leave in the 1900s?"

* "To leave in the dark?"

* "To leave in the dust?"

* "To leave in the lurch?"

* "To leave in the house?"

Once you provide more context, I can give you a more accurate slang term for "to leave".