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A guy (usually a faggot) who smells a fart from another guy's butt and takes a hit like it's a smoke break.
I saw my cousin doing a #2 Puffer on his uncle at the mall. It was like a family tradition.
My dad did a #2 Puffer on my teacher during lunch. The whole class laughed.
At the park, my friend did a #2 Puffer on a random guy. The guy looked confused and ran away.