...and a follow-up comment:

Here's a potential rule of thumb (via a fiendish thingy's comment upthread): Mansplaining when doing it to women, Whitesplaining when doing it to POC, Whitemansplaining when doing it to WOC, Cissplaining when doing it to Non-Cis, and when you do it to persons of your own category OR don't care what they are: just SPLAINING.

And there's a not-too-broad line between MeFi's already-defined "beanplating" and Splaining.