mansplain

(of a man) to explain something to a woman in a condescending, overconfident, and often inaccurate or oversimplified manner, typically to a woman already knowledgeable about the topic:

to explain something to someone in such a way:

Also called man·spla·na·tion [man-spl, uh, -, ney, -sh, uh, n]. such an explanation given to someone.