occurs between two people.
First: person A stretches out person B's anal canal by inserting the middle finger, index finger, and thumb into the bum- and spreads the fingers.
Once anal hole is stretched:
person A inserts the head of a mop- preferably new- part with threadsinto person B's bowels, jiggles mop in order to clean person B's colon.
And that, my dear friends, is the ULTIMATE chimney sweep.
person B: I enjoyed that Ultimate Chimney Sweep you gave me the other night. It cleaned me right out!
person A: No problem, I'm glad I could help with your constipation.
Blowing a smelly fart under the covers, but instead of throwing your partner's head underneath for the dreaded Dutch Oven, you wave the blankets and eject the smell up right at her through a Vietnamese Chimney.
Chris knew that he couldn't get away with the Dutch Oven, but he wanted to share his odor. The Vietnamese Chimney was the right way to go.