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An advanced traffic maneuver in which one slowly inches out into oncoming traffic, until they are blocking the flow of cars (sometimes in both directions), thus ensuring they are able to pull out.

Necessary behavior in places like Rhode Island, famous for it's terrible drivers.
Jim: This traffic is so thick, we're never gonna get out of this intersection.

John: Don't worry, I'm going to employ a Rhode Island Block.
by President Woodbro Chillson April 07, 2011
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