Verb
stack it (third-person singular simple present stacks it, present participle stacking it, simple past and past participle stacked it)
(slang, chiefly UK) To fall over; to topple.
When money was plentiful, I was the first one who told you to stack it. Live your life with it. Now that money slowed up, I'ma be the one telling you to save it like they ain't gon' make it no more. Young Jeezy