'Good morning' — the two-letter greeting, older than the smartphone, which in 2021 a particular corner of finance Twitter adopted as a daily tribal signal, posting 'gm' by the thousand until the abbreviation meant 'I am here and I am one of you'. The record's entry for the greeting that became a handshake.
Seen in the wild on a school noticeboard — a teacher's handwritten poster with GM on it, followed by a smiley. Genuinely unsure whether this is the birth or the death.
The record notes 'gm' is now sent regardless of time zone, that replying 'gm' to a 'gm' is mandatory in some circles, and that the record has been in those circles and left.
A reader points out 'gm' was ordinary texting long before any subculture claimed it. The record agrees and wishes the reader gm.
What does it mean? Write it the way you would say it out loud.
