Close on the troon lore, but the deep lore is it became derogatory somewhere between SA where it started as a purely descriptive term (but may have picked up derogatory implications outside of the trans-goon circles along the way, because goons), and its use by the splinter SASS/TNE/MPC/SS crowd, where I'm pretty sure troon was first used in a derogatory way to refer to non-goon insane trannies by 2013. At least that's the earliest I can find, as SASSclopedia doesn't have troon as a term in what's archived (back to around 200

, and TNE/MPC don't seem to be well archived, so the
non-goon troons thread from November 2013 is the earliest definite mention with that meaning I can find. It
then found its way to KF prior to SS going down likely due to migrants (earliest mention of "troon" by keyword search appears to be June 2016 in the Fire thread).