The song is taken from her seventh studio album, Lover, the first new music released since her departure from Big Machine Records.
It takes aim at male music executives - in particular Scooter Braun, who purchased her back catalogue last year.
The credits stress the video was directed, produced and owned by Swift.
In the video, the lead character, in heavy prosthetics, stops to relieve himself against an underground wall which has been graffitied with the name of Swift's first six albums - all of which are owned by the Big Machine label.