Slam dunk 

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.

Slam dunk by JTTTTT March 23, 2010

Slam Dunk 

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."

Slam Dunk by LeonC August 3, 2003

slam dunk 

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.

slam dunk by VenusFigure December 16, 2011

Slam Dunk 

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!

Slam Dunk by J. Lee18 January 7, 2009

slam dunk 

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

slam dunk by chimpypete February 8, 2008

Slam dunk 

A perfect romantic match. A hot girl or guy.

That gorgeous girl at the office is a slam dunk.

Slam dunk by gluteusmax February 16, 2013

Slam Dunk 

The act of sticking X pills in ur asshole to start rolling.

so you saying im gay because i slam dunk beans in my ass.That shit make me roll HHAARRDD!!!!!

Slam Dunk by Shawn Hoover April 30, 2009