You can chew your damned cud, but please, for the love of all that is light and right and holy in this universe, please do it with your goddamned mouth closed. And no cracking or snapping either. That will cause me to consider ripping your jaw right off your face.
I never crack or snap my gum, unless I am trying to get on the nerves of the idiot who hates gum but clips his fingernails as I am eating my lunch. 
Seriously though, I never learned how to crack or snap gum. Anybody want to teach me how?
If you hate chewing gum, there’s a country made just for you: Singapore