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1.
Girls genitals, pussy, twat, etc etc
"Damn that girl must have a sweet ass naval."

"I would like to see your naval"

in front of girls:

"Yo bro ima get me some naval tonight"
by DOPAM1NE September 14, 2009
 
2.
a belly-button piercing
my naval fucking hurts. i just got it pierced
by Mister David October 23, 2007
 
3.
This word in particular has several meanings to it. "The ancients" which is a population that used to leave in India approximately 3000 years ago. The word "Gentatsu" was taboo under the people of the ancients until 800(BC). The ancient kingdom and culture fell apart because of a little boy of the age 6 who listend to the name Naval by introducing the word "AnalCunt" to the ancients.

Archaeologist recently found hieroglyphs in Egypt which referred to this historic event. It is still a mystery what the hieroglyph exactly says about the ancients but the words: "AnalCunt", "cloud-", "darkie .... horses", "white-liquid on the eyes", "12 Naughty Girls Masterbating 7 (part1).avi" and "12 Naughty Girls Masterbating 7 (part2).avi"

People nowadays use "Gentatsu" as referrence to the little boy called Naval when being perverted.
Omg! Look at that guy streaking!! What a Naval
by Spootnick January 15, 2007