Explain multi-party computation to a normie in 280 characters or less.

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This is true but misses the essence which is that the whole underlying secret is never revealed

MPC is like multi-factor authentication for signing transactions.

You need to N out of your M (N <= M) secrets to sign a transaction and combine the results to get the final valid transaction signature.

Yeah that’s fair, MPC in the context of cryptocurrencies

I assume you mean DKG + TSS? MPC is literally just multiple parties computing something and is not algo specific

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I like this except using “math” as a verb, which to me is very cheugy Millenial-speak

Lets a group of people share a secret so that none of them know the whole thing.

The magic is that they can math together using that secret—to send cryptocurrency, for example. Even after doing that, none of them learns what the secret is.

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Very close, but somehow also need to mention that the password never actually comes together as a whole (in the case of signing)

Breaking down your password into multiple parts in such a way that each part can’t do anything and all parts need to come together for an action to be authorized.

Secure multiparty computation:

Imagine that you want to change the font on a piece of text. So you give one word to each person, and they change the font on that word and return it to you. You get the font changed on your text but  each person who did the work only saw at most 1 word.