To throw down; to drop knowledge/bombs/etc; to lay down the god damn sauce; to reveal information; or to make rapid advancements upon previously unknown prey.
Emmett: Yo, bro, I was fuckin' droppin' hammers last night!!
Me: What'd you do?
Emmett: I told this girl, she should be suckin' my dick, and then SHE WAS!
Mac: Yo, so I told this bitch what was up.
Alex: Fuckin' DROPPIN' HAMMERS.
The infinite amount of space within something in which items are stored. Inventories in video games are a prime example, as the character is somehow able to hold a metric fuckton of stuff without any sign of even a bag on him.
Guy 1: "Dude, 500 pokéballs?! How do you even fit all of that in one pocket?!"