adj,'publicly decreed to be not very good by those of taste and distinction. That which makes an effort to achieve the approbation of the cultural vanguard but fails due to a lack of authenticity'
The word is of uncertain etymology. It
first emerged from the highly non-
standard forms of ebonics used by New York rappers in the late 1980s and
early 1990s.
Because Kriss Kross, is wiggedy wiggedy wack! (Kriss Kross, '
Jump', 1992)
...cuz it's a fact if you wack, you ain't sayin'
jack! (Gangstarr, '
Check The Technique', 1991)