Emergy means in slang: To propagate deception, the possible appearance of a “what-if” scenario using an exaggerated sense of importance.
(in Slang Dictionary, added by Subtend)

What else does Emergy mean?

Donald Trump wrote “this is the National Emergy.” A panic state in which your rant doesn’t go on Twitter fast enough for you to proofread your tweet. A state of anger, confusion and ignorance can also be caused by this.
(in Slang Dictionary, added by Cornuto)