First known usage at Earlham
College, Richmond, IN in the middle 1990's; slang tang refers to the state of being so incredibly
crunk, as to have reached, "the other level." The word is derived from Wayne Smith's "Under
Mi Sleng Teng" which can be found, among other places on the
Big Blunts - 12 Smokin' Reggae Hits compilation album.
Variants include chang clannged; doobklanged, shitklanged, etc...
In conversation, the length of the word is directly correlated with just how slangtanged you or someone else is or was.