In Anthony Burgess's novella, A Clockwork Orange, it's the "nadsat" slang version of saying you're sorry. Synonymous with "apologies" as in "my apologies".
Oh, did I step on your foot? Appy polly loggies, O my Brother!
The necessity and compulsion to share every single fucking thought or emotion with polyamorous partners, for the purpose of avoiding the minor miscommunications or misunderstandings that may not complicate a monogamous relationship, but which may snowball when there are three or more people involved.
Will cause poly relationships to develop at a ridiculous pace, as nothing is ever kept to one's self. Will also seem really, really crazy sometimes.
Omg I'm sorry I was a little distant just now; I was worried I might feel a little neglected eventually, even though I'm not feeling that way at all right now. I was just imagining how it might feel some day. Also, I kind of resent you for that eventuality.
The annoying habit some question-answerers adopt, whereby they offer a plethora of possible answers in order to increase their chances of correctly answering the question.
Amber: Hello Simon! Guess how many pineapple rings I eaten today?
Simon: Gee, that'll be 1 or 5 or 9, yeah?
Amber: Your polyanswerism is not welcome here, Simon
A name for an cheap, old van usually about 20 years old, with around 7-8 seats. Gets its name from being the most common vehicle of choice for Polynesian families with at least 5 kids.