Minor illness of a heartbroken nature related to pining for someone of the Ginger sort (red-haired-ed)- the rarest of all of the humans.
Example:
Girl 1: Oh man that dude Chuck is so awesome! I've got the hugest ginger ailment for him. He's light bright, flamin' hott, and speckled like a cheetah. But that dood won't show me any love no matter how many loads of laundry I wash for him!
Girl 2: He is hot...and is all like Prince Harry charm mixed with David Caruso cool mixed with Ron Weasley awkward. I tried to hit that and all I got was this old moth eaten Abercrombie and Fitch t-shirt to show for it..that I dug out of his garbage.
Girl 1: Sigh..
Girl 2: Sigh...