Probably nothing to your face, but someone will almost certainly remark on your bad manners and speculate on your upbringing.
Added: More important than what people say is how people will feel about you. People do not like to watch other people chew their food, and when you chew with your mouth open, other people will not want to be around you when they are eating. Therefore, they will be reluctant to invite you to other gatherings in the future, and will avoid being around you.
People don't say not to speak with your mouth open, they say not to eat with your mouth open.
People don't say not to speak with your mouth open, they say not to eat with your mouth open.no
open your mouth and say hahaha
they open there mouth and say "Hola"!
Oldtimercandy.com say about 15% of people can take the wrapper off a starburst with their mouth.
Some People do open mouth
Open your mouth and say "you like me"
Open your mouth, then speak..
because they don't eat all the fats we do
You open your mouth and say 'carry in japanese'
Open your mouth and say it. Pretty simple(:
Easy, just open your mouth, inhale, and say the word "no"