Thirteen Things PMS stands for:

1. Pass My Shotgun
2. Psychotic Mood Shift
3. Perpetual Munching Spree
4. Puffy Mid-Section
5. People Make me Sick
6. Provide Me with Sweets
7. Pardon My Sobbing
8. Pimples May Surface
9. Pass My Sweatpants
10. Pissy Mood Syndrome - yes!! My favorite one by far!
11. Plainly; Men Suck
12. Pack My Stuff
13. Potential Murder Suspect