[tanjtanjtanj]

"Geeking out" can mean to overshare or obsess about one's geeky passions but it's also used to mean someone who's tweaking on speed.

The drug-using definition predates the nerd-culture definition from what I can tell (the Urban Dictionary entry is older for one thing).

[voltaireodactyl]

Both predate the internet so that’s not entirely unimpeachable evidence but I can confirm as a first hand source :)