Refering to the nose of a coccaine addict. Meaning that they have snorted so much coccaine that their nasal canals *pipes* have become bloody soar tissue.
Person 1- *takes a bump* *takes another bump* *does 5 lines* * takes another bump*
Person 2- Watch out man your gunna get rusty pipes!
When getting your girl from behind, you toss the sleeper hold on her and knock her out ala Rowdy Roddy Piper. While nailing your unconscious victim, you get to simulate your life long dream of necrophilia. Now you never have to break into the morgue again.