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While smoking Marijuana communally among a group, a bottlenecker is an individual, when passed, keeps smoking the joint/spliff much longer than they should resulting in others frequently reminding them to pass the joint/spliff to the next recipient.

The individual effectively creates a bottle neck in the flow of weed being consumed within the group.
Dude you've become a bottlenecker these days - you never pass the spliff!
by howiquitweed November 02, 2011
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