What is Smash That?
1.
1. to fuck the shit out of somebody
2. the more hardcore form of "smacking that"
"dude, see that girl over that, id smash that!"
See
2.
This is a form of telling someone (usually a guy) to hit on the opposite sex; most of the time looking to only have sex.
"Scott go smash that!"
"Are you gonna smash that?"
See