1. preroll - Noun
2. preroll - Verb
(film, uncountable) A period of time during which the camera rolls but before the action begins.
(Internet, advertising, countable) An advertisement that plays before the main content.
Synonym: intromercial
A joint which has been preprepared by a cannabis vendor or dispensary.
I bought prerolls for almost a decade until I got good at rolling my own joints.
To roll something in advance.
To make or show a preroll.
Source: en.wiktionary.org