When a human tries to establish dominance over their human counterpart by taking a bowel movement aka “a shit” in their counterpart’s rectum. One partner sits with the back of the legs the other person’s back while they are in upside down position with their knees tucked in the chest. The dominant counterpart then defecates. If you live on the east coast or Midwest it is more mommonly referred to as a Brick Shithouse...
I had to boss up on my girl last night. I put her in a Texas Jackrabbit aka Brick Shithouse and wiped my ass with her hair.