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)