Bilbo wishes confustication on the dwarves, dwarves wish the same on him.  OED calls this one colloquial and its etymology “Fantastic alteration of confound and confuse”, attested in the 1891 Farmer and Henley dictionary of American slang and… 1937, The Hobbit.  We may have just been handed our own silver platter as collateral, but that’s just fine with me.

• 01.059 Confusticate and bebother these dwarves!’
• 06.012 confusticate him!’
• 08.064 Hi! hobbit, confusticate you,

“confusticate, v.” OED Online. Oxford University Press, March 2015. Web. 20 May 2015.