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The act of transporting large objects (sheets of wood, mattresses, etc.) on the roof of one's car using only hand strength to retain the cargo.
Mexican Hand Clamp example:
Juan: Yo vato, we need to rent a truck to transport some plywood.
José: No esé, we'll just (Mexican) hand clamp that shit on my 94 Civic and drive reaalll slow.
by Elijah Brown March 08, 2018
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