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1.
vag.na.na vag-NAH-NAH noun. 1. the passage leading from the uterus to the vulva in certain female mammals

2. PG form of the word 'vagina'
Girls don't like sex on the beach because it can lead to unwanted sand in their vagnana.

He had a 12 inch swizzle stick and kept ramming his fingers in my vagnana. Next time I'll just use a dildo.

Jennifer is really furious today, and is acting completely incoherently; it must be her vagnana again

You sir, are a vagnana
by nanagirl September 27, 2006
 
2.
A banana that has has been inserted into a vagina leaving it with a distinct fishy/vagina smell
Hey dude!!! Smell this banana! It stinks like fish?!!?

That cos its the vagnana that i used on your mum lastnight
by Griffballs June 06, 2010