The term 'Bull on Glue Bottles' is a reference to the popular cartoon character Elmer Fudd, who is often seen carrying a gun and chasing after Bugs Bunny. Elmer's catchphrase is 'Be vewy qwiet, I'm hunting wabbits!' The crossword solution for this term is ELMER, which is a five-letter word. Elmer is a lovable, yet bumbling character who is always trying to catch Bugs Bunny, but never succeeds.