mansplain

to explain something, especially to a woman, in a condescending manner assuming ignorance on the part of the person spoken to, while, in fact, the other person may be as well or better versed in the subject as the speaker. The term was coined shortly after Rebecca Solnit's 2008 essay, "Men Explain Things to Me," although she says she had nothing to do with its actual creation. She adds, "I have doubts about the word and don't use it myself much; it seems to me to go a little heavy on the idea that men are inherently flawed this way, rather than that some men explain things they shouldn't and don't hear things they should." Objections to the term are not lacking (see the Urban Dictionary on "mansplain") so use it as defined, not as a loose descriptor for anything objectionable.