The act of sexually assaulting a cremated person with a penis. It is similar to chalking a pool cue, but a penis instead of a cue and a cremated person's ashes instead of chalk.
I heard your mother was cremated last week. I'll miss fucking her, but I guess I can stillchalk the cue.
When your significant other takes out their glass eye and you gently insert the head of your cock into the socket in an effort to attempt a traditional "skull fuck" of some sort.
When Ron Jeremy met Sandy Duncan, he thought he might need a minute to chalk the cue.