Danbury shakes

An archaic American folk term applied to the uncontrollable shaking fits observed in a disease later identified as Huntington's. The word predates clinical diagnosis and belongs to a tradition of descriptive vernacular disease names; it reflects 19th-century rural communities naming frightening inherited conditions by their most visible symptom.

(US, slang) Delirium tremens.

The d.t.'s is slang shorthand for delirium tremens — the severe alcohol withdrawal syndrome that causes shaking, hallucinations, sweating, and in serious cases can be life-threatening. It's the physical reckoning that hits heavy drinkers when they stop suddenly, and the phrase has been in circulation long enough to feel almost casual, despite describing something genuinely dangerous. You'll hear it used both seriously and as dark humour around hangover culture, though the real d.t.'s are no joke.