when you want to - or are going to have sex with a person or persons. Also can be used in past tense "slam dunked" when you have smashed said person or persons.
boy 1 - look at that thicc girl with dat noice booty
boy 2 - you should totally smash her
boy 1 - hell yeah ma boi I'm about to slam dunk her
boy 1 - look at that group of varsity college volleyball players
boy 2 - holy shit they hella fine
boy 1 - imma slam dunk the shit outta them
boy 1 - did what happened last night?
boy 2 - I slammed dunked her
boy 1 - proud of you
boy 2 - you should totally smash her
boy 1 - hell yeah ma boi I'm about to slam dunk her
boy 1 - look at that group of varsity college volleyball players
boy 2 - holy shit they hella fine
boy 1 - imma slam dunk the shit outta them
boy 1 - did what happened last night?
boy 2 - I slammed dunked her
boy 1 - proud of you
by gvsolt June 4, 2018

by Kevin Booba Rice September 4, 2022

when the girl lays on the bed, legs spread, and you just go running at her and shove it in on force.
by thiccc.dickkkk January 19, 2018

by Zedopotomus March 12, 2016

When you have a girl on her back with her legs over head, with her asshole gaped. You dip your ball sack into her welcoming hole.
by Willymac December 5, 2024

When you EAT SHIT everyday you get this MONOPOLISTIC thing happening where SLAM DUNK EXPANSION is the only way SHIT WILL LETVYOUR STOMACH GO
TO.
TO.
by .MANDATORY SHITEATER August 12, 2022

when she bounces your balls like a basketball, slams it with a hammer.
thus leading the balls to bounce of the human to the floor
thus leading the balls to bounce of the human to the floor
by HueHefner tha goat December 10, 2017
