@ice1517
@WingbeatPony
I think I found the origin of it.
I first did a search for “sexy spitfire, -spitfire” just to clean out any strays. And I found out there used to be a tumblr blog called “sexyspitfire”. Which is probably where that tag got started, about 4 years ago.
So I tagged every image sourced from that Tumblr with “tumblr:sexy spitfire[](/tags/tumblr-colon-sexy+spitfire). Removed Sexy Spitfire from the images it didn’t apply to. And then aliased sexy spitfire into stupid sexy spitfire~