Kosher

Kosher is a classification of foods that make it edible for Jews.
Unlike Islamites (who stick to the Hallal diet), the kosher diet permits alcohol. However, dairy and aminal flesh must never co-exist on any given porcelain dish at the same time. It is preferable to have porcelain dedicated to aminal flesh and other porcelain dedicated to dairy.
That's right, no steak and cheese! No authentic poutine! No cream cheese with bacon bits on salad or Bajels!
Kosher is what you must eat if you are a Jew. Circumcision in itself, however, does not oblige this diet.