riding a surfboard or like object down the rushing stream of water of a street curb gutter.

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.

drinking the last drops out of anyone elses' cup of beer in a last ditch effort to get even more intoxicated.