An expression when things just aren't going right.
It's snowing again? Shit la merde.
when you are covering yourself with your own shit
Hey my brother is shit hocking right now being a fucking weirdo
An exclamation for surprise or excitement. Replaces "oh shit," "Damn!," "Holy fuck," etc.
When something is really amazing
This restaurant is shit out of the window
Comes from the way a mongoose moves – they're known for their fast, darting movements. So, "shitting like a mongoose" might be a humorous way to describe someone rushing to the toilet with urgency.
I ate a bunch of fiber and now I've been shitting like a mongoose all day.