to the moon prepositional phrase 4exclamation 1 prepositional phrase4 •(old-fashioned) To a very distant or unreachable place. •(slang) Towards prosperity and greatness. •(slang) Of a cryptocurrency, increasing rapidly and substantially in value. •(old-fashioned) Used as an intensifier: very, immensely, to a great extent.When I saw him, he was wired to the moon. He didn't come down for two days. exclamation1 •(slang) An aspirational or rallying call for confidence that the value of a cryptocurrency will greatly increase in the future.