A person of low intellect, low or no personality or one who, no matter how hard they try, can't touch anything or undertake any task without it turning into poop but still thinks they are the bomb.

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.