The term "Femi-nazi" is a pejorative term used to identify feminist women in general. It also refers to the "exaggeration" as a mechanism to neutralize men. It was first used by a conservative northamerican named Rush Limbaugh during the 90's . He invented the term to disgrace the women fight for having control upon their fertility and pregnancy, that is, the legalization of the abortion. This way, Rush Limbaugh compared the Nazi Holocaust with the abortion.
The concept of "Hembrismo" is a fallacy as well as it is the term "femi-nazi". Why? Because these concept is based on a socio-economic system grounded on a matriarchy, that is to say, the moral superiority of women, which does not exist in the real world.
And, what is misandry? Misandry is the hate or aversion to men; and this is actually a real thing, not common, but real. Whereas misogyny goes always hand by hand with sexism, misandry is NOT comparable to feminism; they have nothing in common.
The terms Femi-nazi and Hembrismo are used by sexists to disgrace and discredit the feminist fight and as an excuse for sexist people to don't make a self-analysis of their sexist conducts. This two concepts only serve to prevail the differences between bith sexes and the machismo.