Top Definition
Old people and the US Navy's way of saying that some is the wackiest, most famous (or infamous), most important fucking thing in the whole damn power point.
"As you can see, Petty Officer Wham A. Dyne's special request chit will not be approved in this example."

"On this slide you can see a super whamadyne submarine capable of diving an excess of 15 feet."

"Shipmate, your have the most whamadyne integrity I've ever seen."
by GloriousStag April 29, 2014

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