I bought the bars out, put it on my tab
He bought all the bars. When you usually buy a drink and put it on the tab. Lupe is a big roller and will bu a bar so he can own it then let his accountants put it in his tab.
Lupe isn’t a drinker though, so this lines true meaning is that he bought/brought the bars (lyrics) out, and used all the good one up, so there are none left for you.
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