A transninja is a person that is transgender, but you would never know it unless told.

n. The birth name of somebody who has changed their name. Most commonly attributed to trans people, but can be attributed to any person who has changed their name. (sometimes written as two words: dead name)

v. 1. To call somebody by their deadname.
v. 2. To out somebody's deadname to the public.

A transninja is someone who perfectly imitates the opposite sex to fool or fully become one with the sex. Some transninjas cover it up so well you wouldn’t be able to even no they were trans. Most transninjas hide their birth sex from their partners allowing them to believe that that is who they were.

Shortened word for transgender ninja