Another way of describing masturbation. More commonly when talking about Transformers fans. The semen is then refered to as Energon. If done in the bathroom, the toilet becomes the Space Bridge. Decepticons are the bad guys from Transformers.
"After Rick saw that hot babe with the DD breasts, he ran into the bathroom and started battling the Decepticon."
"How do you know?"
"There was Energon in the Space Bridge."