Another word for a Penis, when used for anal sex. It can also be used as another word for a Butt plug, dildo or any other object used for anal pleasure or pain!
It can also be used as a insult, when talking about someone who is a pain in the arse.
My girlfrind loves anal sex! It must be down to the way I use my Bum Javelin!
James is such a Bum Javelin! He does my head in!
Becky loves using her collection of Bum Javelins! She is obsessed!