be a slam dunk(redirected from been a slam dunk)
be a slam dunk
To be predicted or expected to be successful; to be something that achieves success or a certain goal easily. All the best players in school are on our team—victory will be a slam dunk! I thought it would be a slam dunk to pass, but the bill didn't even make it out of committee.
be a ˈslam dunk(American English) be something that is certain to be successful: The case looked like a slam dunk for the prosecution.
In basketball, a slam dunk is the act of jumping up and putting the ball through the net with a lot of force.