A reference to the pathos of my early life as an only child since in order to have regular friends, I needed to fold them into existence as origami ones.
I’m sorry that I won’t be able to come over tomorrow, Catherine, my little folded friends have informed me that I’m busy playing with them.
Used with humor, as a simple statement, in a conversation when you strongly disagree with the majority. Originally a French term used in psychiatry to describe a mental disorder in which two or more associated persons share the same delusion. In other words, you are saying "The two of you share the same delusion." Translated "madness between two."
Two others state "G. Dub is an excellent public speaker." In your disagreement, you respond with "Folie a deux!"