Following up on this aside here to avoid hijacking that other thread with aviator stuff …
I recognize CIGAR as a mnemonic and at one point eons ago I knew what it meant/means. I have no clue today. I have never heard of the others.
Though I do recall what GUMPS means and when to use it. And did more or less use it back in the day.
Which is not to say that you’re wrong about them being common. My point would just be that different areas of aviation have different traditions of knowledge.