When you do or say something that most ordinary people would recognize as "Stupid".
Yamato: O (oh) as in Zero...K as in Cat.
Normal person: Dude...you just pulled a Yamato...
by IEatPeople October 28, 2008
The I.J.N. Yamato was the worlds largest, heaviest, fastest battleship in the world, armed with 9 18" deck cannons, it weighed 75,000 tons, and had a top speed of 28knts. But it was sunk using airpower, and was the last battleship to see action.
The Yamato had suprem fire-power, but it was no match against American airpower.
by Minority July 26, 2006
the first sign of unity in japan (empire kingdom or confederacy)
i am studying the yamato
by Skimboarder July 29, 2009
A penis
"Yo man my yamato is huge!"

"Do you have a yamato?"

"Damn, my yamato is so huge even Yamato can't believe it!"

by YourYamato March 25, 2009

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