I don't know. We just made it up based on the fact that "Testify" was derived from the word "testicle" and then we just changed it to nad.

Marginalized Orientations, Gender identities, And Intersex. it’s meant to be an all inclusive umbrella term for asexuals, homosexuals, multisexuals, trans people, and intersex people. Alternative to LGBTQIAP+
Alternative to MOGII, easier to pronounce.

To confirm, concur or corroborate. Normally accompanied by a confident jerk of the the neck.