Rappers tend to rap large amounts of lyrics in their songs, but they hardly hold any meaning to them. Luke is referring that his lyrics are well thought and dense.
Wale believed that on 11.1.11 when his album dropped his haters/critics will have a change of heart and become a fan. His first album only sold 28k the first week, but Ambition, sold over 150k, a huge improvement.
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Wiz pronounces “Cali” (Cali kush, a potent strain of pot) like “Khaled.” DJ Khaled is famous for his catch phrase “we the best,” so Wiz plays on that by saying his weed the best, making weed sound similar to we.
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