Short for "fatspiration" or "fat" + "inspiration", as opposed to thinspo or the related fitspo. Often consists of pictures of fattening foods or overweight / obese people, along with inspirational quotes promoting fat positive / body positive attitudes. Oppositely employed by those who strive to lose weight (often in the anorexia / bulimia communities ana/mia) as examples of what they don't want to look like. Primarily used by women describing images of themselves or other women, whether admiringly or disparagingly.
I'm sick of all the pro ana websites out there, so I'm posting some fabulous fatspo!