2. To be on the clock at work.
3. Working in general
words are commonly placed in between stackin' and loot. the words are reversable as well. for example.
stackin' mad loot
stackin' crazy loot
stackin' some loot
stackin' that loot
"Ohh i'm just at work for a while stackin' loot"
"Yo is that a good job?"
"Hell yeah son, I be stackin' mad loot at that place"
I've been loot stackin all day man, now it's time to unwind.