1 definition by Haz Newman

Top Definition
Boy better know is JME's record label. The phrase is used in fights and verbal abuse, meaning that boy better know what he is up against. (girls also can use this by sayin 'gyal better know')
sum person - 'u wasteman'
sum ova person - 'yea, boy better know'
by Haz Newman April 17, 2007

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