What does the expression, "You have got some kind of grit," mean?
Is it sarcastic, like being a bit crazy?
"Grit" is defined as:
Saying that you have "some kind of" something is another way to say that you have a "variation of" or "form of" that thing. "Some kind of grit" means that you have a form of grit. The connotation of the phrase implies that you have an exceptional or uncommon grit. Completely reworded:
There is a significant difference between "some kind of" and "a bit" in the sense that "a bit" is a sarcastic reference to the quantity of something. "A bit crazy" means "a lot crazy"; "some kind of" carries no such connotation. Its literal meaning is very close to its practical meaning.
The word grit in this sense is defined as
So saying that some has
means that they are strong and usually courageous. Or willing to face danger.
So, "a bit crazy" could make sense here.