What was the original meaning of the expression “a hair of the dog that bit you” (a cure from hangover)?

jerry127, Read the question. It asked for the original meaning, not today’s.

jerry127, don't feel alone I did the same thing its a common saying for a hangover

Your answer is incorrect. Not for rabies but excessive alcohol use as stated right in your answer explanation!

jerry127, I answered the same as you did, as I'd never heard it used for any other reason but I appreciate that I learned how and why it originated.

jerry127, Yes, it does and no, it doesn't as it further stated that it was originally coined as a term for the treatment of rabies by using a hair from the infected dog, by which a person was bitten, by binding the hair upon the wound; the name of such practice came from widely accepted medical doctrine dating back to at least the sixteenth century.

so I chose a cure for excessive libation and get marked wrong and sows cure for rabies. But then the story says I was correct.