Top Definition
sounds like a dirty word but its actually a marine engineering term for containers fastened together to support a floating bridge, boat or plane
She sunned her voluptuous body on the pontoon bridge across the pond.
by mandingoe May 05, 2004

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The part of a catameran that keeps it afloat on the water. A catameran has two pontoons that are shaped like canoes. They are connected by a platform that the person sailing the boat sits on.
Without pontoons, a catameran would not be able to sail.
by zanny May 26, 2004

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A beast of a word used by old pedophiles use to entice children into there bedrooms.
Old Man: "OOOOOOOOOH PONTOOOON"
by Charles Of Nazereth December 30, 2004

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a fat chick
When she walks that pontoon's ass looks like two bulldogs trying to fight their way out of a bag
by Gabe Benitez July 18, 2011

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The opposite of wretched;

Someone or something that is completely cool, laid-back and ready to party.
Gurrrrl, that feathered hair is so not pontoon.

Vice Vaughn in Swingers is so pontoon.
by Jason Jopke June 06, 2005

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Pontoon and drug used by people who have ADHD.

How bout them addies son?
I got a orange pontoon.
by Smacktards October 09, 2007

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a code-name for penis
"Theres nothing like splashing a little water on my pontoon."
by Skott October 17, 2004

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