Used to describe something shitty.

Nonsense, utter rubbish, BULLSHIT.

Something totally stupid, not cool, or retarded.

Whack; Boring; No fun.

1) Substances duplicitously sold as illegal/illicit/recreational chemicals that do not produce the desired effect.

2) Illegal/illicit/recreational chemicals cut to such an extreme that their effect is severely reduced.

1 not good; crappy

2 Commonly used as a substitute in the name of something that you don't like.

Low quality marijuana. In various songs and used by dealers and potheads everywhere.