Jeebus…is that some Christian shit?
I would interpret that as asking if my name has something to do with Christianity, or is a reference to Chrstianity. And I would reply “no, it’s in part a Simpsons reference, and also an inside joke I had with my friends.”
Is the issue with the word shit? Because I could’ve used stuff, if you prefer.
If you just stepped in dog poo, you wouldn’t say:
I stepped in some dog facile matter.
You might say:
I stepped in some dog shit.
Some contexts are different than others. Saying ‘shit’ in front of a religion name is incredibly offensive. So, yes, I would prefer that you say ‘stuff.’