Before us millenials had our own take at inventing initialisms and proto emojis…
Beepers. Pagers.
A fair number of different kinds of ‘codes’ became at least somewhat widely used as shorthand for more semantically complex things, and they had even smaller character limits.
https://www.wikihow.com/Pager-Codes
Now I was like 5 when pagers were all the rage, so I have no personal experience with these, but this was arguably the gen x version of millenials who spent too much time on computers as children coming up with ‘gtfo’ and ‘lmao’ and ‘rofl’ and such.































What about…
Tripod
Ole’ Faithful
Emergency Coat Hanger
Meatrod
Dingus
… ?