A whole other dimension in the universe, more commonly known as the annoying layer of air in common packaged snacks that detracts from facilitated consumption and enjoyment
This is mainly a form of greeting or acknowledgement. You simply thrust out the peace sign with your fingers and say, "snackies". Some people have peace forums or philanthropist groups calling themselves The Snackies.
A snackers coma is when you start eating something, such as a large bag of potato crisps, and you start reading the fridge/wall/cork board/newspaper and then you 'wake up' from your snakers coma and realise that you have eaten the WHOLE BAG. The chance of this happens increases exponentionally when under the influence of recreational drink or drugs.