What a rich and wonderful thread. Now I've never heard a song using the word "sesquipedalian" in it but why not start now:

My old man's a sesquipedalian,
What do you think about that?
He wears a sesquipedalian raincoat
And a sesquipedalian hat;
He wears sesquipedalian underwear,
And sesquipedalian shoes,
And every night when he gets home
He reads the Sesquipedalian News.

Cheerily,
Charley Noble