No this is quite serious in spite of it s regrettable racial connotations This is quite common terminology in the South East of England and London Nigga refers to the blackness of the cloves smoked in similar style to the Indonisian Kretec whereas cracka or cracker a racial term used against Caucasians refers to a J devoid of blackness ie cloves Niggas tend to smoke slower and have more flavour whereas crackas smoke faster and are more intense in my inexpert opinion