籃球場上的那個動作
這一家就是畫面本身，名詞講那一球，動詞講那個動作。
noun · B1
In basketball, a shot in which a player jumps up to the height of the basket and pushes the ball straight down through it with one or both hands.
灌籃
核心畫面
Picture a player rising until their hand is above the rim, with the ball held there. The ball is not thrown and it does not arc through the air hoping to drop in. It is pushed straight down through the net from above. Two things come out of that picture at once: it can hardly miss, and everybody in the building sees it happen. Every other use of slam dunk lives on one of those two feelings — near-certainty, or a win too loud to argue with.
可以想成這個畫面：球員一直往上跳，跳到手比籃框還高，球就拿在那裡。球不是被拋出去的，也不用在空中畫弧線、賭它會不會掉…更多收起
可以想成這個畫面：球員一直往上跳，跳到手比籃框還高，球就拿在那裡。球不是被拋出去的，也不用在空中畫弧線、賭它會不會掉進去。它是從上面直接被壓進網子裡。這個畫面同時給出兩種感覺：一是幾乎不可能失手，二是全場都看得見。slam dunk 後來的每一種用法，都是靠著這兩種感覺其中一種長出來的——不是「穩了」，就是「贏得沒話說」。Two branches
從球場借來的「穩」與「贏」
把那一球的兩種感覺拿去講別的事：事情還沒做時借「不可能失手」，事情做完後借「全場都看到、沒得爭」。這是比喻上的延伸，不是在說歷史來源。
noun · B2
Something that is certain to succeed, or that will be very easy to do, so that nobody expects any trouble with it. Informal, and used mostly in American English.
十拿九穩的事
原始詞典資料4 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
slam dunknoun
- 1
ball-gamesbasketballgamesAn impressively forceful dunk.
- 2
A task expected to present no difficulty, a piece of cake.
- As long as you get the vice president's approval first, it'll be a slam dunk.
- 3
Tacking on top of the wind of the following yacht in close quarters
slam dunkverb
- 1
To perform a slam dunk.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。