Bertie, I love that quilt -- and the fabric on the back is wonderful. Lucky Cogito!
Regarding Oof-dah ... I don't know where he got it from, but my son uses Oofka! a lot. Means the same thing. Perhaps he picked it up playing Husker-du?
Here is what I found as an explanation -- although urban slang says it means
something quite different 
Hmmm. How about an oof-dah theme some month?
