something that is a sure to occur; a foregone conclusion; "predicting his success was a slam dunk"
a forceful dunk
a type of dunk where the ball is thrown down hard through the basket.
Slam Dunk (ã‚¹ãƒ©ãƒ ãƒ€ãƒ³ã‚¯ suramudanku) is a 31-volume Japanese manga series written by Takehiko Inoue about a basketball team from Shohoku (ShÅhoku) High School. It has sold over 100 million copies in Japan alone.