sure thing(redirected from a sure thing)
Inf. I certainly will. Sue: Will you be at the reception? Bob: Sure thing. Bill: You remember my cousin, Tom, don't you? Bob: Sure thing. Hi, Tom.
1. a sure thing. A certainty, as in Making the bestseller list has been a sure thing for Stephen King. This usage originally alluded to a bet that one could not lose. [First half of 1800s]
2. Yes indeed, certainly, as in Are you coming tonight?-Sure thing! This use of the idiom as an interjection dates from the late 1800s.
n. something that is absolutely certain. It’s a sure thing! You can’t lose!