noun
1. something that is a sure to occur; a foregone conclusion
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predicting his success was a slam dunk
• Derivationally related forms: ↑slam-dunk
• Hypernyms: ↑certainty, ↑sure thing, ↑foregone conclusion
2. a forceful dunk
• Derivationally related forms: ↑slam-dunk
• Hypernyms: ↑dunk, ↑dunk shot, ↑stuff shot
Useful english dictionary. 2012.