cones - Short for Silicones.  See Ingredients.  There are several and for most curlies, they are hair poison.

co-poo - Washing your hair with a premixed amount of conditioner and non-sulfate shampoo.

low-poo - Using sulfate free shampoos as often as possible

no-poo - Usingly only conditioner to wash your hair

plopping - Process of applying conditioners & styling aids (gel, mousse, etc.) to hair and then wrapping it up in a special way to aid curl formation.

plunking - see plopping

slip - This refer to the "slipperiness" of conditioner.  Some are "high slip" and others are "low slip". 

sulfates - see Ingredients - Sodium Lauryl Sulfate, Sodium Laurelth Sulfate, Ammonium Lauryl Sulfate or Ammonium Laurelth Sulfate