Today I accused my sister of acting like chaff, and, being the inventive person that I am, I carefully crafted a brand new word for this occasion: chaffy. And that would have been just fine and dandy except that–wonder of wonders!–it was a real word, created long ago by those most eminent sages the lexicographers.
The word carries the meaning of being like chaff, chaff being the leftovers from winnowing grain. It is generally used metaphorically to mean something that is empty or useless. Not that I was calling my sister that. She was just scattering some things like chaff.
What do you know! Learn something new all the time.