One who has a hatred for men. One who cannot be equitable to the human race and opposes the sexes to each other instead of complimenting each other.
A person who alienates the male population in their writing based on propagating a constant usage of "she".
One who uses "she" instead of "they", "them" or some other pronoun that is gender neutral.
"Wow, Laura the lawyer just rejected Joe the Plumber, what a femisoginist!"
"Jeanne Sahadi is a femisoginist, as shown in her writings."
"So someone in the 35% bracket today would save $35 on a $100 deduction. Under Obama's proposal, she would save $28." - Jeanne Sahadi