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1.
A big flabby loose pussy. Term originates from contraction of "whale vagina." Whales are known to have the largest penises in the animal kingdom--upwards of 10 feet in length and a diameter of 1 foot.
"Damn, look at that ASS!"
"Don't bother, I heard she got a whagina."
by Chihiro January 27, 2006
 
2.
A vagina that is not pink, but white.
look at the whagina on that one!

i was scared to see that the mole rat was not pink, yet white... like a whagina
by DJZ February 28, 2004