Top Definition
Style of Hip Hop Music which is mostly about living with mental illness. First used by Oblyveus Cracker A white rapper to describe his style. 5150 stands for a section of the California Welfare and Institutions Code (specifically, the Lanterman-Petris-Short Act or "LPS") which allows a qualified officer or clinician to involuntarily confine a person deemed to have a mental disorder that makes them a danger to him or her self, and/or others and/or gravely disabled. Drift is just another word for flow
example of 5150 drift style lyrics from the song "Unstable" by Oblyveus Cracker-

Three pills in the morning three more each night, still inside I feel so cold and dead I think the dosage aint right. But I do what they say so I stay here outside, cause the walls of the psych ward would eat me alive, 5150 drift I have nothing to hide, keeps me from melting, helps me survive. -
by (====}`~~~$m0k3r July 19, 2010

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