crapper

[krap-er]

noun Slang: Vulgar.

Origin of crapper

First recorded in 1930–35; crap¹ + -er¹

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

And ultimately the ten vehicles halted in Crapper Street, to the joy of the simple inhabitants.
The Card, A Story Of Adventure In The Five Towns
Arnold Bennett