It is not a real phobia but a monstrosity as a word that mixes 'man', of Latin origin, with the suffix -phobia, of Greek origin; And it is a mockery, an irony towards someone who feels rejection by men, since in this case 'man' does not refer to the human species, and 'phobia' is misinterpreted as 'hatred'. See androphobia, misandry, anthropophobia, misanthropy.