A white powder which is sold as cocaïne by swindlers. A lot a youngsters unknowingly buy nocaïne the first few times. Nocaïne is baking powder most of the times.
Dave: I got some cocaïne, wanna try some?
Al: Sure... What the fuck, you have been ripped off.
Dave: What do you mean?
Al: This ain't cocaïne my friend, this is nocaïne.