And niggas don't be tripping,
Tripping, here, has two meanings, for in a sense unrelated to drugs, it simply means to act unreasonably, but with respect to drugs, tripping means to essentially go crazy while on drugs. While drug trips are not always negative, and even the most seasoned drug-users trip out when doing certain drugs, tripping on drugs such as lean is often characteristic of a lack of experience with the substance. Thus, D-Mo is saying that he and the S.U.C. have been sipping purple drank and smoking weed for a long, long time.
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