when something is to large to measure or(and) desribe.

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.

adj. = Any living thing or object that resembles or has evolved from dinosaurs.

Something so ancient that the only word that comes to your mind is Dinosauric.