2a: extreme fearfulness of swallowing liquids that is symptomatic of rabies and results from painful spasms of the throat
In classic cases, there is a fear of drinking liquids, or hydrophobia, despite thirst due to spasm of the throat muscles.— Lawrence K. Altman, The New York Times, 24 Aug. 1993
b: rabiesRabies victims at first feel a general malaise and restlessness, then grow increasingly agitated with painful spasms of the throat. … Soon they cannot drink, which is why rabies has been called "hydrophobia."— Wayne Biddle, A Field Guide to Germs, 1995