Used to describe a person that is very polite or Charming for their own gain
Example Business people can be charming or "Sweet" to customers.If customers see them as igornant or "Sour" they will not shop there Hence the phrase Ya wont catch Flies with Vinegar
When someone is being extremeley anti-social.Often this person does not go anywhere because they are spending an abnormal amount of time with their hundreds of cousins and goin to 50th birthday parties or just lying in there wee gypsy house in trentagh beacause theyre "wile tired man".The person may spend an large amount of time at "Norahs" also.