I mentioned some posts back that a 'gob' is as much fiber as you'd want to spin at a sitting. Well, we've got a new one. According to Seebs, "An 'oodle' is enough yarn to make two socks and have enough left over that you kinda think you could make something with it but you can't." Very useful measurement, that.
I plan to query him soon on what a 'scad' might be.
He also had this bit of wisdom: "Yarn leftovers are a good thing. Two socks are much more useful than 1.9 socks." I don't think anyone would dispute that, but it won't stop me from collecting bowls full of grape-sized yarn balls in the expectation that someday, when I wake up one morning miraculously sane, healthy, and replete with free time, I will make the most amazing fair isle hat in the universe.
Edit: I asked him. He said, "A scad is enough to make one sock and one scarf. This is why you always hear of 'scads', plural." My love is a wise man.