When you are smoking marijuana, herbs, the good stuff, with multiple people and each person takes 2 hits then passes it to the next in a rotation.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

1. A game in which everyone in a circle passes a spliff, bong or other smokeage. Everyone puts five on it. Each time you take a hit you say "puff puff pass." If you fail to say it, cough or pass out, you're out of the rotation. The last person holding the smokeage keeps all the money.

2. A reminder that someone is holding and should pass.

A game in which a joint is made then passed around in a circle of people everytime a person takes a smoke of the joint they must say "Puff puff pass" if they fail to say this or get knocked out or cough while saying it that person is eliminated. You keep going around intill the last person is standing therefore they get the "pot" It cost $5 to enter a puff puff pass game.

what you do when you're smokin weed with ya dawgs

When a pod of dolphins irritate a pufferfish, and pass it around much like people often do with Weed. Hence... puff puff pass