noun
reefer
REE-fur/ˈriːfər/
A cigarette containing marijuana.
She spots a half-smoked reefer in the ashtray.

Etymology
Origin uncertain. Mexican Spanish grifo and reef, “roll up a sail,” are competing proposals for the cannabis-cigarette name.
More examples
- He calls it a reefer, but she says joint.
- Two reefers lie beside a pack of cigarettes.
- Someone passes a reefer around, but I decline.
Forms
reefer · reefers