Trembles or rapid back-and-forth movements; drinks made by blending ice cream, milk, and flavorings; to move back and forth rapidly.
From Old English 'scacan,' an ancient Germanic word meaning to shake or move rapidly. The drink meaning emerged in America in the early 1900s.
The shake as a dessert drink was an American invention, and its name makes perfect sense—you literally shake the ingredients together in a metal container! It's one of those words where the method of making something became the name.
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