Another name for a going down on a girl during her period. Usually performed while extremely drunk and/or hard up for action. Related to: a big glob of cold pizza sauce dripping down your chin, you sick bastard.
It was dark but I could smell it and I could hear the crinkle of her pad... I ate the cold pizza anyway.
Once you eat cold pizza, you are a kool aid man.
I looked in the mirror and saw I had a red goatee shit I ate cold pizza last night.