This is attributed to Brian Greene. [See source.]
Entropy is a measure of chaos, of the degree of disorder. The higher the entropy, the more disordered, the messier things are. Your bedroom, for example, is likely in a high entropy state of being, while your parents' room is relatively low entropy. [That was my input, sorry.]
Humpty Dumpty before the great fall was low entropy. You can tell he was at low entropy because the slightest crack or variation on his pristine, smooth white shell would be noticed by any outsider. And that's the nature of low entropy. When it's easy to see that something's been changed, that's low entropy.
Afterward, with all those innards and shell bits lying all about, that was high entropy and all the King's men could not reassemble HD and return him back to his low entropy state. The King's troops kept shuffling the innards and shell bits around, trying to get HD back together, but all that shuffling just kept ending up with no change in the mess...the remains still looked to be in disorder And that's the nature of high entropy. No matter how or how much things are moved around, it still looks like a mess from the outside.
Which is why our universe is a net increasing entropy system...the Second Law of Thermo. It keeps getting messier over time and cannot be reassembled and returned to a lower entropy state. Energy that was once useful can no longer be corralled and used because it's in total chaos. In fact, our universe was in its highest state of order, the lowest entropy, at the moment of the big bang. And it's been going downhill every since, to a chaotic state we designate as high entropy.
"The Fabric of the Cosmos" by Brian Greene, who spends several chapters on the arrow of time and entropy as the cause that aims the arrow of time.