PBE- Noun-The courtesy often given back & forth or expected between comrades whilst smoking marijuana or any orher than pink or purAlso, the process of clearing out the stale, leftover smoke that lingers in the chamber.
"Hey man, you hear about the LIT! party that's going on tonight? Last time no one thought PBE was a real thing!

The proper bong etiquette is crucial in a group session of smoking....
by Staci Rogert, *"PINKIE"* February 24, 2023
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