Saw it in a T.V. show. Name for a person who cancels all the time. They make up a silly excuse to not do something but a few days later, they are magically fine.
Friend one: "Sorry man, I can't go hiking with you today. My ankle is severely sprained."
*three days later*
Friend one: "Hey man, let's go rafting today!"
Friend two: "Didn't you just sprain your ankle? Dude, you're such a ronnigan.."