(in basketball 篮球 the act of jumping up and putting the ball through the net with a lot of force 强力灌篮；扣篮 - (North American English, informal)
something that is certain to be successful 必定成功的事；稳操胜券的事 Politically, this issue is a slam dunk for the party. 在政治上，这个议题是这个党的一张胜券。 🔊🔊 The movie is sure to be a slam-dunk hit. 这部电影肯定是灌篮高手。