What exactly does it mean to put one's thang down, flip it, and reverse it?

[Lord of the Large Pants]

It sounds like it would hurt a lot.

 

[CallmeCicada]

Stop listening to nigger music, they can barely speak.

 

[Party Hat Wurmple]

It means I pee backwards now.

 

[dick brain]

You may ask yourself, how do I work this?
I put my thing down, flip it and reverse it
This is not my beautiful house
This is not my beautiful wife