jeez it up

read the bible, go to church, talk about jesus, think about jesus, etc.

Most commonly "Jeezin' it up."

tony: What'd you do this sunday?
Mark: I was just jeezin' it up at sunday school.

C'mon, jimmy, let's head over to the church to go jeez it up.

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jeezed up

Derogatory word for going to church, usually reserved for referring to other people or when one has to go to church when they don't want to.

I just walked past two kids carrying cateschism textbooks. I bet they were going to get jeezed up.
OR
When I was a kid my parents used to make me go get jeezed up every Sunday morning.