The assumed name of one who has undergone a spiritual awakening, with or without the aid of sacred herbs or other hallucinogens, and has decided to rename themselves something more appropriate to his or her enlightened status.
Hugh Romney assumed the nom de mello Wavy Gravy after what he considered a mystical experience onstage with B.B. King.
"She gave herself the name Ananda, it's a nom de mello."
Person A: I just had some guy offer to eat me out on my lunch break... I think single life is getting better everyday
Person B: You're just very vag-nom deprived and are starting to hear things.