The same as the more commonly used term "royai" to mean the pairing of Roy Mustang and Riza Hawkeye from the manga/anime series Fullmetal Alchemist. (A pairing full of angst and symbolism.)
royai fullmetal alchemist roy mustang riza hawkeye

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.