Same thing as running a train, except a man (or a woman, if you swing that way) is passed around, eating everyone's pussies, rather than a woman (or a man, if you swing that way) is passed around, sucking everyone's dick. Often used as a form of hazing in sororities.

a phrase chiefly used in northern England.

it is a contracted form of "it'll be reet", where "reet" means "alright" or "OK".

living your life according to "be reet" is the only way to find happiness in life.