This is a nonsense phrase in english.
Similar phrases that do have meaning, but I don't know if any of them fit:
you are not of this world / you are too good for this world (for someone who's so kind / giving / moral that they get taken advantage of)
You're out of this world (you're great, groovy--this is a bit 1960's-1970's)
Your head is in the clouds (you're not paying attention)
You are not well grounded (you or your arguments lack a sense of reality or a basis in reality)