Monologuing

[Sonia]

The present tense/active form of [monologued]. The act of delivering an involved stream-of-consciousness [exposition] or explanation, usually in an overly dramatic fashion, that completely halts the conversation. Like in a book or movie where the action screeches to a halt so the character can [stand and deliver] a huge load of backstory or explanation. Not always TMI or a rant, although those can be forms of monologuing.