Translated from Latin to English, "Ad Hominem" means
"against the man" or "against the person."
An Ad Hominem is a general category of fallacies in which a claim or
argument is rejected on the basis of some irrelevant fact about the author of or the person presenting the claim or argument. Typically,
this fallacy involves two steps. First, an attack against the character
of person making the claim, her circumstances, or her actions is made
(or the character, circumstances, or actions of the person reporting the claim). Second, this attack is taken to be evidence against the claim
or argument the person in question is making (or presenting).