The moment when all of the alcohol you drank hits you in the face.

When you fail at something more than another expression can describe.
"Yo bro, I just got SLAM DUNKED by these shots."

"Fuck, I'm going to get slam dunked on my exam tomorrow"
by SlamDunker51 March 6, 2014
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Slam Dunk centers around Hanamichi Sakuragi, who starts as a delinquent outcast, becoming the leader of a gang. Hanamichi, being very unpopular with girls, has been rejected by them fifty times. Yet, he finds out that Haruko Akagi is the girl of his dreams, and is happy when she's not scared of him like all the other girls he has asked out. Haruko Akagi, who recognizes Hanamichi's athleticism, introduces him to the Shohoku basketball team. Hanamichi was reluctant to join the team at first because he had no previous background in any sports and thought that basketball was a game for losers (also because the fiftieth girl rejected him for a basketball player). Sakuragi, despite his immaturity and hot temper, proves to be a natural athlete with potential and joins the team in order to impress Haruko and prove that he is worthy of her. Kaede Rukawa — Sakuragi's bitter rival (both on the basketball court and love, even when Rukawa doesn't acknowledge Haruko's crush on him), the star rookie and a "girl magnet" - joins the team at the same time. Hisashi Mitsui, an ex-junior high school MVP, and Ryota Miyagi, a short but fast player, both also rejoin the team and together these four struggle to complete team captain Takenori Akagi's dream of making Shohoku the national champion. Together, these misfits gain publicity and the once little known Shohoku basketball team becomes an all-star contender in Japan.
Slam Dunk is a sports-themed anime series about a basketball team from Shohoku High School. There are a total of 101 episodes.
by ♫ Highway to Hell ♫ September 4, 2010
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To encourage someone you are hooking up with to give you oral sex, by pushing their head downwards.
Kate: OMG he tried to Slam Dunk me last night, and I was like watever!
by acillatem July 11, 2008
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A heinous cousin of the upper decker (a classic bathroom prank), in which someone first defecates then procedes to place his or her fecal matter into a light fixture or other raised object in the target bathroom, leaving quite a surpise for whomever enters next.
To demonstrate her hatred for corporate America, Lauren left a slam dunk in the lamp in the Starbucks.
by JTTTTT March 24, 2010
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One of the greatest sport comics ever, about a high school basketball team. The main character's headstrong determination and lack of self consciousness will become the spirit of this team.
"Sannoh is a good team."
by LeonC August 4, 2003
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To masturbate into your hand and then dunk onto someone's head, back, face, etc.
Dude! I totally slam dunked Sally in the face. It was awesome!
by J. Lee18 January 8, 2009
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