When 2 or more people engage in a contest involving their farts. The goal of the contest is to either produce the most consistent, loudest, or perhaps heaviest fart capable of a normal human being.

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.