kiss it goodbye
kiss it goodbye - verb: to take the last toke you are going to get on a joint or blunt before passing it to someone else or extinguishing it. Sometimes this can occur without one's foreknowledge.
This joint is pretty small, do you want to kiss it goodbye before I put it out?

There were so many people smoking on the blunt, I kissed it goodbye on my second hit!

We smoked half of a joint at the concert then kissed it goodbye - we passed it to some guys behind us and it never came back.