Jim and I played Scrabble tonight – and I had a lousy combo of letters.  Towards the end of the game, I was getting frustrated, and decided to see if I could get away with adding an “t” to an existing word, to create this word (and yes, I presented the definition with the word):

Mewt adj (myut): a cat that cannot meow

Strangely enough, Jim wouldn’t accept the word.  But he did laugh.  The cats, however, were not amused.