- A slang term for cannabis. While the exact etymology is uncertain, one potential origin is the Spanish word “grifa,” a term for cannabis. The word was popularized as slang by the film Reefer Madness (1936), an early anti-cannabis propaganda film that has gained cult status for its, frankly, ridiculous plot.
What does “Reefer” mean?
Example usage for Reefer
“My mouth is so dry because of all that reefer we smoked before we got here.”