When they say hair of the dog when having a hangover what does it mean?

It means to have a drink of whatever you were drinking that got you that way.

When they say hair of the dog when having a hangover what does it mean?

It means to drink more.

When they say hair of the dog when having a hangover what does it mean?

Hair of the dog that bit you, as in a sip of the drink that got you pissed

When they say hair of the dog when having a hangover what does it mean?

It's from the advice, "Take a hair of the dog that bit you" to cure a dog bite. Apparently, if you laid a hair of the dog that bit you over a dog bite, it would cure the bite (that's assuming that you could get a hair from an angry, biting dog. Not easy!)

As a hangover cure, it means drink some of the drink that gave you a hangover. It's a homeopathic cure--you take in some of the substance that harmed you.

It works sometimes for allergies. For hangovers...uh, not really. More alcohol isn't the answer.

Though many people do take a hair of the dog as a cure.

When they say hair of the dog when having a hangover what does it mean?

hairthe hair of the dog that bit u took ur poptart and ate it, so

When they say hair of the dog when having a hangover what does it mean?

It means you will feel better if you drink whatever it was that made you feel bad the night before.

When they say hair of the dog when having a hangover what does it mean?

For future reference just google "idioms" and it will offer you a selection of sites that give definitions of all sorts of idioms and euphemisms like the one you mentioned.