Good thread.
"From: Mrrzy - PM
Date: 06 Nov 20 - 12:00 PM

...I didn't know pride *only* referred to that. I felt all curmudgeony the way I am sure people did about gay not meaning happy any more."

I am beginning to feel the same way about the use of the rainbow - though I can see the logic as representing a spectrum.
I remember when 'gay' started being used that way - I had a friend called Gay, doubt if you'd abbreviate it like that now

"From: meself - PM
Date: 06 Nov 20 - 12:44 PM

"grock" - seems to mean "understand"
That one probably comes from a Heinlien SF novel about a Martian. I think it was used in that to mean a deep understanding and empathy with someone, though the Martian had difficulty explaining it.