1 definition by KHANO

Top Definition
The measurement of a bongs full capacity reaching the top of the neck but does not include smoke inhaled. Usually used in the context of bong that needs to be cleared or when newbies need others to milk it for them.

commonly shortened to "stack"
ex.1
"She cleared like 3 stacks out of my straight shot.."

ex.2
I don't wanna finish that stale smoke stack!
by KHANO June 22, 2011

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