Rusty Drain 

A sexual fetish or sexual move where after pooping, one does not wipe well enough and leaves poop on the butthole then gets their ass eaten

My buddy is a little weird, he asks girls to not wipe so he can get a rusty drain.

Rusty Drain by Insertfunnyname June 7, 2018

Rusty Drain pipe 

The act of urinating inside his/her anus and they stand up and let it drain on you.

Last night, Stacy gave my a rusty drain pipe.

Rusty Drain pipe by Buccos26 December 8, 2018

Rusty Drain Pipe 

A dirty, unwiped anus.

Oh my gosh, she bent over and I saw she had a rusty drain pipe.

Rusty Drain Pipe by Johnjimo April 16, 2021