Steel Eel 

One male beats their boner over the head of another person. Is considered a sexually pleasurable act, but could be considered an act of punishment.

Dude my head is a little sore from the Steel Eel you gave me last night.

Steel Eel by Big Red 78 March 14, 2011

Steel Eel 

A boner, often erecting straight out of the front of your pants, like an eel comming out of its cave

Joe contracted a huge steel eel when he saw the head cheerleader naked.

Steel Eel by Pimpdaddy Fried September 24, 2009