What is Stack It?
1.
To bring or pile something or a situation on.
So whats the going on withcha', just stack it!
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2.
to stack it is to fall over
james stacked it and broke his leg
3.
To fall over in a spectacular or amusing fashion, often to the immense amusement of the people around you.
I can't believe I stacked it up the stairs and passed out. I'm such a klutz.
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1.
Information that is basically just the same, but however for some reason or another regarded as superior.
This site offers better info ..