rainbows and unicorns UK /ˈɹeɪnbəʊz(ə)nd ˈjuːnɪkɔːnz/US /ˈɹeɪnboʊz(ə)nd ˈjunɪkɔɹnz/ noun[plural only]1 •A wonderful (but often unrealistic) scenario.Just a few days earlier, the president [Donald Trump] had remarked that "nobody knew that healthcare could be so complicated". Now he's promising rainbows and unicorns. — 2017
