Meat Sackin

Place your penis in downward position and flip nutsack over penis, with one testacle on each side of the shaft.

Did you see Cody meat sackin last night? Yes it was phenomenal.

sackin' the hack

Slang term used to describe the activity of using a hackey sack. Can also be used for hacking, though this variant is rare.

"Dude, you would not believe what I did yesterday!"
"Bro, what?"
"I was sackin' the hack!"
"Aww heck, dude."
"Yeah, exactly."