Jack of Swords

A person (usually cis) who lets their partner be dominated by trans women. They love being belittled, supportive, and docile to their King of Swords while their woman gets all her holes filled by her gock.

See also:
Queen of Swords

Trans Woman (KoS): Hey, IDK if you know this but your wife has a Queen of Swords tattoo, are you a Jack of Swords?
Cis Guy: I... I know, I really love trans girls. They're extremely beautiful and much better lovers of women than me. It's an honor to know my wife is getting pleasured by someone who can really do a good job.
Trans Woman: What a good boy!~ I'll let you watch with a cage on next time.