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1.
Statically charged homosexual fish of the large variety. They take pleasure in taking advantage of the smaller fish by statically shocking them into sexual submission.
Billy: OH MAH GAWD! What is Jerry the sturgeon doing that goldfish!?

Johnny: It's natural... he's a nardong
by ColonelPineapple March 25, 2010
 
2.
A man who wears the trousers in a homosexual relationship.
Man 1: Hey did you hear Gary and Trevor are bumming?

Man 2: Yeah, I heard that Trevor is a real Nardong!
by beaversweat November 27, 2009