1 - the intact quality of a single condom package that has not been compromised.
2 - the quality of breasts to be used as a resting place for your head.
3 - the fluffy quality of an actual pillow
1 - "She pressed the center of the condom to test its pillow-bility to see if it was still viable and ok to use"
2 - "Her breasts had a certain pillow-bility about them that made them his favorite place to nap"
3 - "It's important to know the pillow-bility rating of your pillow - i like mine soft but my boyfriend likes his firm"