MAKES ME WANNA FUCKING MURDER THEM! There is nothing quite as irritating as the repetitive sound of biting into an apple followed by the crunching when they bite off a piece that's just a little too big to chew with their mouth closed.
It's ALMOST as irritating as the clink-clack-clink of a spoonful of milk & cereal hitting someones teeth just before the slurp-slurp-slurp and crunch-crunch that inevitably follows.
These two situations are like nails on a chalkboard to me. I tense up, and i can't think cleary. I usually end up either putting my hands over my ears and yelling "la la la la", running out of the room, or saying something like "could you shut the fuck up with your god damn apple over there buddy?!" and of course to everyone else around, they didn't even notice the noise, never mind got as enraged as i did.
i was in a meeting a couple weeks ago and the guy beside me was eating an apple while my boss was questioning me. so hard to keep a straight face. i did the same thing to him the next week, but my apple was much bigger and his hearing proved to be much worse.