Note that the word metaeuphoria is a protologism with aspirations of someday becoming a neologism, though its usage remains limited at best. In fact, it lacks meaning because it has no contextual use whatsoever. If anything, it's barely hypertextual through its self-referential mentions at metaeuphoria.com (and now at wordie.org).
As a chance linguistic commingling between the prefix meta and word euphoria, you have a state which can only be described as beyond common or everyday euphoria (if only there were such a condition). Any more elucidation requires far keener disambiguation.