Joke Junkie 🍻 on Instagram: "The Shake Weight is a well-known fitness product that became famous—and somewhat infamous—for its unconventional design and viral marketing. Released in the late 2000s, it’s essentially a modified dumbbell with spring-loaded weights at both ends, designed to oscillate as the user moves it back and forth. The product claimed to tone arms and upper body muscles more effectively through "dynamic inertia." What really made the Shake Weight a pop culture sensation was it

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