Padlocking

[Michiko]

Verb. The act of inserting ones penis into ones own rectum representing the shape of a [padlock] in an attempt to [derive] sexual pleasure.
Upon reaching climax the penis is forcefully [ejected] from the anus in a manner of an unlocking padlock

[Tanya Shivari]

When you go up to some douchbag with huge [gauges] and you take a [padlock] and [lock it] through there gauges.