Dang sure phrase informal
Totally certain.
I think he's coming. That's for dang sure.
We are dang sure that we will finish the project on time.
I am dang sure everything will be fine.
Meaning absolutely certain or without a doubt
Another way to say "absolutely", "definitely" or "for sure"
That's absolutely right.
With absolute certainty; decisively
You can be absolutely certain that something is true or will occur.
To do something in an unusual way
I guess I like to run against the grain in everything I do.