It's not actually in my active vocabulary, but the concept was. My husband gave me a book of mangled song lyrics with cartoon pictures to match. I always did hear "There's a bad moon on the rise" as "There's a bathroom on the right." (I guess the living room was on the left? But then, if you consider that the line about the bustle in your hedgerow is correct, who knows what these crazy rock-n-rollers are up to?)
Anyway, I knew I had heard it, so I just had to look it up to remember the correct word. (And saying it was related to Spoonerisms was a big clue.)
Okay, this one is for Tanit.
14 letters. 6 syllabiles. Abstract noun.