I recently moved desks at work and the bloke who sits next to me eats like an absolute pig. Chuffing and snorting and smacking his lips and yamming away ALL FUCKING DAY
It is giving me the absolute rage. Impolite eating is something I just cannot stand, it sets my teeth on edge! No issue with eating at desks though, as long as you can do it without sounding like a warthog 
I must admit I have had to really restrain myself from dirty looks/tutting and have had to resort to a walk around the office in occasion to get a break from it....what can I do to deal with it? I really dont think I can put up with it long term.