the.com/shake

The handshake's lazier cousin, the milkshake's thicker uncle, the earthquake's smaller sibling.

means To move rapidly back and forth or up and down, or to make something else do so — from trembling hands to a mixed drink to a wobbly plan.

from From Old English 'sceacan,' meaning to move quickly, flee, or brandish — a word so old it already had multiple personalities before English even settled into itself. It's related to other Germanic words for swift, jerky motion, though the exact family tree past Old English gets murky. The sense split over centuries into everything from 'shake hands' to 'shake a leg' to the milkshake, which got its name because the drink was originally shaken, not stirred, blended, or questioned.

milkshakes
Originally an 1880s alcoholic whiskey drink, not dessert
handshake history
Possibly began as proof neither party held a weapon
shakedown
Slang for extortion, from literally shaking money loose
fair shake
American idiom from dice games meaning an honest chance
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