The Kolkata Sewer Pipe refers to a person’s ring hole. Other names given to the Kolkata Sewer Pipe are: Sphincter, arse (ass), poo shoot, Khyber Pass, crack, bum, crevice and back door to name but a few.
Me mate Timbo has been smashin the porcelain all day. It seems the old Kolkata Sewer Pipe is working over time.

Can also be used as follows: “He always had a fondness for the old Kolkata Sewer Pipe”.
by Davo Koala Pants August 6, 2019
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