Something a girl suffers when she is on the rag. Feels like one is being stabbed in the gut with a knife or giving birth. Typically make a girl lay in the fetal position or want to sit in the shower/bath for hours on end. Cramps can be felt during ovulation two weeks before the period actually starts. However, cramps are the worst on the first and second day of a girl cycle. Also used as an excuse to avoid sleeping with a man that has a small penis.
SHIT MAN! My cramps are so bad I want to cut out my uterus!
Boyfriend: Do you have cramps babe?
Girlfriend: Fuck off!
On night stand Man (with small dick): So can we bone tonight?
Woman: Lets just fool around. I have my period and really bad cramps.