OK, I'll jump in here. I haven't read all of the previous posts. Sorry if some of it is repeating what's already been discussed.
To my way of thinking, "mansplaining" is when a man explains something to a woman, plus one or both of the following:
1.) She already knows it. Maybe she even knows more about it than he does, but he acts as if he's teaching her something new.
2.) He takes a condescending tone and uses belittling words like "honey," "babe," and "sweetheart."
(Not that those words are *always* belittling, but they certainly wouldn't be appropriate in a business situation, would they?}
Yes, it can happen in reverse too. The stereotype of a man condescendingly explaining to a woman exists for a reason, but any Southern woman worth her salt knows how to use "oh, honey, bless your heart....." as a massive put-down.
Also as I understand it, condescension is acting superior to the other person when you aren't really. There are things in life that my husband knows more about than I do, and things that I know more about than he does. When I ask questions and he teaches me, then at that moment and in that situation, he is in a position of superiority. His attitude may *look* condescending, but it acutally isn't, because he really is above me in that specific set of circumstances. Retired from bus driving, he works in home health care now. That's something I know more about than he does, and he relies on my input a lot. If I were to try to teach him something about driving, especially if I weren't familiar with what he already does or doesn't know, that would be "womansplaining" by the definitions I understand. If he were to try to teach me how to take care of a resident with a developmental disability, especially if he isn't familiar with what I already do or don't know, that would be "mansplaining" by the definitions I understand.
Once when hubby was out of town for a month, and he had to rely on me to take care of the bills, this issue actually did come up. Our HOA is the only bill we still have to pay by mailing a check, and he was convinced I didn't know how to write one. (rolls eyes) I had called him to get the address where to mail it, and I needed no other information. I already had the check made out to "Name of HOA" in the proper amount, and he wasn't sure I'd done it right. There's a certain way they want it made out, he insisted, or they won't take the payment. Hold on, let him look through his stubs and see how he made it out before.
Guess what? It was "Name of HOA," just like I had it in the first place. (rolls eyes again)
I agree with people who say let's take gender out of it and call it "explaining in a condescending manner" or "treating people like they don't know a dog from a doorknob," but people tend to like the shorter words and fewer syllables, I suppose.
@MehGuy I don't think there's anything wrong with feeling a "masculine rush" after you've provided help that was asked for and beneficial. I may be "womansplaining" here, but it could be you feel like a man as opposed to a boy, rather than a man as opposed to a woman.