It means that a person is abstracted from reality, that he is daydreaming or living fantasies.
See what, verbs/means, "to be on the moon", "to be on the moon of paita", nefelibata, "to be with the moon", "to be someone of good moon", "to be someone of bad moon", and finally have a lunatic expression.
being distracted , not realizing what is happening; mentally far from what it is about; absent, moody (TG. ) .
It means to be on the Moon is incorrectly written and should be written as "Wasting time" being its meaning: Who is birding. With my mouth open, looking at nothing.
Be out of reality. He said who still present does not pay attention to what is said or is made at the place where this