The act of stacking ducks on top of each other, while trying to get each duck to continuously quack in harmony. Mostly done with friends in competition to see who can quacker stack the best.
Hey John, do you want to go quacker stackingtoday? I bet I'll dino dong off you!
The act of staying at someone else's house overnight, in order to make a person jealous. You don't necessarily have to do anything sexual, just as long as the other person thinks you did.
You want to make her jealous, you need to find a girl to shack with.
Verb 1. Hitting on a girl so hard that no one else can even get close to her, esp. when you have absolutely no chance. 2. The ultimate form of cockblocking.
Things were going well with Tracy until Steve got drunk and started stacking on her. What a buddy fucker.