Rusty Boner 

An erect penis that has been withdrawn after anal sex with a partner who has diarrhea.

Bill had a "Rusty Boner" after his girlfriend ate at P.F. Changs.

Rusty Boner by Mattastik Four January 12, 2009

Rusty Steel Boner 

When your dick hasn't gotten hard within a long period of time and it suddenly turns REALLY hard!!

DUDE i havent jacked off in such a long time that I got a RUSTY STEEL BONER and i came like no OTHER!!

Rusty Steel Boner by Pspman July 10, 2009

Rusty Turn Boner 

When a male engaged in vigorous anal sex breaks his dick inside said anus. Upon the breaking (and after all the anal pressure) the person receiving the anal sex becomes incapable of containing themselves and releases their fecal matter all over the broken penis. Therefore, making it a "Rusty Turn Boner."

Todd: Who was on the phone?

Chris: That was the hospital, Hank got admitted...

Todd: Oh my God, what for?

Chris: They say he got a Rusty Turn Boner and is going to need surgery.

Rusty Turn Boner by Marshall Branch February 23, 2011