I saw a sign once that said: Esta--blished. I couldn't for the life of me figure out what esta blished was. It took about 3 months before it suddenly dawned on me that it was established.
Reminds me of the gag at 1:07 in this Benny Hill clip:
One time I was reading an internet blog about film analysis and criticism, and an unfamiliar word kept popping up. The word was "docus," which I assumed rhymed with "focus." I wondered what the hell it meant until I realized it was pronounced "dock-yooz" -- Variety
-speak for "documentaries"!