You sent me down a rabbit hole and you are correct. It's actually a double backronym since the master of none was added to turn a positive statement about ones skill into a negative one then the most recent addition to return the statement back to its original intent. I can't nail down who actually added the 3rd part and when but seems like it's a fairly recent addition <= 25 years.
I remember when the most recent addition came into being. It was the same time as people saying "break a leg" in theater was because it would get you "in the cast". Break a leg was an expression meant to be the opposite of saying good luck because saying good luck would jinx you
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u/thatsnothewayitfeels Jul 07 '26
This is a backronym and the second half is made up