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1.
One who is not a grandparent but is prone to taking naps during the afternoon for 1-2 hours.
I had a nana nap this afternoon and now I am ready to party again!!
by Aussieandy January 24, 2011
 
2.
Nananap is a nap for old farts who can't last long enough (that's what she said).
Me: "Watcha doin 'insert name'"
Person:"I'm going for a nap"
Me:"Lol having a nananap you wrinkled sack?"
by mingmingexpress May 20, 2013