have the shakes

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have the shakes

To tremble or shake involuntarily, as due to fear, unease, anxiety, or a reaction to (or withdrawal from) a substance, such as caffeine, drugs, or alcohol. I've been doing public speaking for 10 years, but I still had the shakes when I gave my speech to the packed auditorium. I'm trying to get sober and haven't had a drink in four days, but I've been having the shakes something fierce.
See also: have, shake