How to remove this buffalo hump naturally and safely? (Photo)

I don't know of any non surgical way to improve this. Liposuction generally works well for this type of fat deposit. If for some reason the fat is really fibrous you may need it excised. 

Hello and thank you for your question. Based on your
photograph, you are a great candidate for liposuction of the posterior neck. The most important aspect is
to find a surgeon you are comfortable with. With good surgical technique, you
could have an outstanding result. I recommend that you seek consultation with a
qualified board-certified plastic surgeon who can evaluate you in person.
Best wishes and good luck.
Richard G. Reish, M.D.
Harvard-trained plastic surgeon