As the youngest member in family of rather effusive talkers, Philip has always had to fight for his right to be heard. Once, when he was around three, he interrupted an adult discussion in in the front of the car by pointing to himself and calling out loudly from his car seat: "HELLL-LLLO! Can I have some talk back here?!?"
Philip also has a terrifically fertile imagination, so that in his head he's constantly inventing new playground games with complex rules, or devising plans for world conquest as the superhero Captain Fire. And of course, he loves to share these plans with the family.
Amazing, non-stop detail.
So it doesn't surprise us that these days, in the car or at the dinner table, if someone should give the conversational floor to Philip, it's not likely to be relinquished anytime soon. This is only partly because he has something to say -- it's also because he simply wants to give his parents and siblings payback for all the years he had to sit quietly, listening to all their talk.
Hence, the word for today, to describe these occasions when Philip makes a parliamentary power grab using his gregarious gift of gab:
phil·i·bus·ter fil-uh-buhs-ter -noun