PMS

13 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 Sweat pants
10. Pissy Mood Syndrome
11. Plainly; Men Suck
12. Pack My Stuff

and my favorite one :

13. Potential Murder Suspect