Somebody who worships the cannabis plant religiously. When registering at a thc-ministry one gets an unlimited marijuhana-license because the first Amendment of US-constitution guarantees religious freedom.
Christian: Do you go to church?
Cantheist: No, I smoke shit to worship god.
A person who is indulged in filthy practice of discrimination based on caste and also practices untouchability. Deeply prevalent in India, a castiest can be a man or woman irrespective of age. Castiest stops casteism only upon his death.