A bone inside the penis i.e. something that's non existent or extremely hard to find.
It's probably easier to find the "cock-bone" than Osama alive
by mariaras December 09, 2008
What appears in your penis after rubbing it, having it rubbed, etc.
I looked over at Gringo and saw his cockbone sticking straight out.
by snasty January 23, 2009