The tendency of some "geniuses" to tell people of their master plan to destroy them before actually doing it. This usually results in the plan being foiled and said "evil mastermind" getting their comeuppance.
When you become so zooted (stoned) that you begin talk to yourself in the third person, while often creating imaginary people to have hypothetical conversations with. Essentially, you are having a conversation with multiple people that are within your mind discussing hypothetical situations that are often ridiculous and far-fetching.
Jay Leno might as well have a dialogue, since his band leader always laughs at the jokes that bomb and then continues to talk to Jay to make up forthe silence afterwards
When your mother or mother-in-law calls to talk about everything and nothing at the same time. You have no hope of ever contributing to said conversation, and this tends to last for hours at a time. Unless you can find a timely excuse to get off the phone, you "lose signal", you pass the phone off to someone else (also known as a dick move), or she runs out of things to say (ie, the end of the world) you are permanently glued to the phone.
Jimmy was waiting for his girlfriend to call and was unfortunate enough to walk into a momologue due to his lack of caller ID.
Larry had been subjegated to so many hours of momologue, that 6 days later his landlady discovered his emaciated body attached to a phone, with some faint chatter going on in the background.
"Dude, your mom needs friends or something, thats the 3rd party you've missed this month."
"Dude, I know! She momologued for so long, I took a nap, woke up, and she was still going on about Aunt Linda's dog!"