I was thinking of a chumhandle a while ago. I like birds (among other animals), and thought of the name for the order of passerines, Passeriformes. I thought, hey, I could make a pun out of that that would be chumhandley enough. My first thought was passeriFormal, but--in spite of my admittedly stilted way of writing--I wouldn't consider myself a very formal person. So, I went with passeriInformal instead!

I also think "passeri" sounds nice, and "PI" is a fun abbreviation ^w^