What does "Pinner" mean?
Definition: A pinner is an incredibly thin joint or spliff, rolled in such a way to either save weed or to spare someone who is smoking alone from getting way too high. A pinner is not something you bring to a party to share, unless you want to be laughed at. However, nobody will complain about your pinner if you've spent the last 30 minutes scrounging around the house for those final scraps of weed, and you're still willing to share it with them.
Example usage for Pinner
"I wanted to smoke so badly, I burned that pinner down in one breath."