what is kosher?

Kosher is a term to describe any food that complies with a strict set of dietary rules in Judaism. These rules are called kashrut.

foods cooked and prepared in accordance with dietary guidelines of Jewish law.

It's like "Don't eat meat on Friday", only much more sophisticated…

Like halal I guess similar

Food fit to be blessed by a Rabbi, and certain practices on food combinations/preparations

I really can't complain, everything is kosher
Two thumbs up from
Ebert and Roper

If not mistaken, food considered Kosher is blessed by a Rabbi.

Adhering to Jewish law.
Islam has halal.