the.com/secret handshake

Trust, compressed into a gesture, so you never have to say the password out loud.

means A private gesture — a specific grip, squeeze, or sequence of moves — used by members of a group to recognize each other without words.

from Not a single coinage but a longstanding practice: craft guilds, fraternal orders (Freemasons are the most famous example), and secret societies developed physical grips as recognition signals, partly because many members historically couldn't read or write, so a gesture worked where a password or written token couldn't. The phrase itself is a plain compound — 'secret' plus 'handshake' — that entered everyday English as these societies' customs became widely known and parodied, eventually loosening into the word's modern, lighter use for any inside gesture between friends, kids, or coworkers.

origin
freemasons used them to verify membership in secret
function
identity check disguised as friendliness
modern form
fist bumps, fraternity grips, startup culture rituals
paradox
secret only works if everyone already knows it
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