@Mame,
Mush is another word bandied about in these parts.
Mush is a slang term for the mouth in most of the country, but it also has another meaning down here.
It means a person, usually a man, and although it's not particularly polite or friendly, it's not that rude.
Often people will talk about meeting some mush, and if you were called a mush, (depending on context,) you wouldn't normally take offence, like you wouldn't if someone called you a bloke or a guy.
When I was on holiday in Mexico we met some nice people from Kentucky and wanted a photo with all of us in. We were on a ship, and their calls of, "Excuse me sir," went unheeded. My "Oi Mush!" got the desired effect.
At first he looked angry but when I asked him very nicely if he would take our photo he was fine.
(You can get away with a lot in Mexico if you have an English accent.)