Discover what hashtags mean, and add your own definitions in seconds.
Discover what hashtags really mean.
Instead of voting down the only definition of this hashtag, scroll down and add your own!
Perhaps you want to vote up another definition, or scroll down and add your own?
Any disease that only a few people in the world have that typically has no cure. Also known as Orphan Diseases because there is little money for the bigger pharmaceutical companies to profit from.