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the whole megillah
Everything; the entirety of something. There's nothing more to tell you. That's the whole megillah. While I'm in Europe, I want to go to Paris, London—the whole megillah.
Also, whole schmeer. Everything, every aspect or element, as in The accountant went through the whole megillah all over again, or Her divorce lawyer took him for the house, the car, the whole schmeer. The first term alludes to the Megillah, five books of the Bible read on certain Jewish feast days and considered by some to be very long and tedious. Schmeer is Yiddish for "smear" or "smudge." [Slang; second half of 1900s]