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mansplain: machoxplicar
Thanks to Ann Deslandes for posing the question of how to translate this, and to Diana Ojeda for coming up with such a fabulous solution! It's a brand new neologism with no googlage - so here's hoping you'll help me to circulate it!
I notice that the Spanish wiki entry just keeps the English term mansplaining, but I think this works much better. It certainly has a clearer ring than the androplicar option I found!
Brett Rowan also hilariously suggested chicodicho, but I don't think that's as clear.