A: If you don't shut up now, they're gonna kill you.
B: They can just try.
Is B's response natural here to express resistance?
Is B's response natural here to express resistance?
I don't think "They can just try" is natural; just not feeling the "resistance" here. I would prefer something like "Let them try" (or something like "Let them come" depending on what is said earlier).
Here:
Source: Google.