When you are having sex and you shove your balls in along with your penis.
Can I give you a "slam dunk" this time babe?
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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!
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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.
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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.
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the act of shitting in your hand and inserting said piece of faeces into the gaping mouth of a bystander, best served to a person you have a beef with.
Dude, I just slam dunked Cheryl. She deserved it.
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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!
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the art of masturbating in front of your girlfriend, who then has to jump and land open mouthed on your penis. she scores more points if no semen escapes.
my girlfriend slam dunked me good last night, we're thinking of going professional
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