A reefer is a slang term used to refer to a joint. It originated way back in the 1930s and the first time that the word appeared in print was in 1931. Time Magazine had featured an article that stated that cannabis could be dried and ground up and then rolled into a reefer cigarette.
Some people claim that it was named reefer because, in sailing, reef means rolling up the sail, almost in the same way that you would roll up a joint. The reefer who rolls up the sale would refer to the sailor who is doing the rolling. In the 1930s, cannabis was seen as a hugely negative substance. Anti-cannabis claims were all over the place claiming that it made consumers of it extremely violent. This anti-cannabis campaign was also aimed at demonizing Mexican immigrants that used cannabis.
Scare tactics were used on a wide scale to demonize the drug and to constantly warn people of the dangers associated with it. Reefer Madness was a film that focused on high-school students that went to reefer parties and end up in tons of trouble along the way. It was a way to warn the masses of the potential issues that could occur if people used cannabis. The term reefer is not used much anymore in comparison to when it originated in the 1930s.
Use of Term
I rolled a pretty large reefer because I’m going to meet up with a bunch of my friends later and I’m sure many will be in the mood to smoke it. I prefer to just bring a reefer to social settings like that because they are easy to transport around in comparison to hauling my big bong around, and sometimes, a bong gets me too high for that type of setting.