Something as in anything or something as in some specific thing?

Anything

They'd have to specify something because if I were to pick something at random it might be something they already know, then I wouldn't be teaching them anything I'd just be personsplaining to them. Although I could be certain that they hadn't thought of the ramifications of saying "teach me something", so you could say that simply by bringing this up I would be teaching them something.

What is the "or else" here? Is this someone armed? Need more info and ten minutes to plan the agenda. Do you know what type of learners they are?

I’d gray rock them, because I refuse to contribute to their social media content.

After I learned what this was I realized I've been doing it to a few people in my life already lol

It definitely helps with my insanely annoying coworker who is literally incapable of not talking if he sees another person. He will talk to you if he sees you even if it's just to talk about kitty litter. God forbid you have a conversation anywhere near him he will insert himself into it and try to take it over.

I'd teach them something.

I'd pull up the Arch Linux wiki and hold them captive.

What would you teach them?

Probably box breathing as a start, or how to do binary arithmetic. Maybe an mnemonic for remembering the names of the Great Lakes.

shrugs

unzip