look up any word, like donkey punch:
 
1.
PNA
pretty naughty angel
She's a pna - She's a pretty naughty angel
by DannyDK March 11, 2008
 
2.
Proceedings of the National Academy of Sciences, a prestigious scientific journal with an extremely unfortunate acronym.
Scientist #1: Hey, could I take a look at your PNAS?
Scientist #2: Sure, as long as it's for science. <unzips pants and whips it out>
Scientist #1: GOD NO WHY I meant your Proceedings of the National Academy of Sciences!
Scientist #2: Oh, ok, sorry. Huh, that's the tenth time that's happened this week.
by Foodinator November 06, 2013
 
3.
Take a guess. Look at all the other entries beginning with "p" and sounding vaguely like "p-nas" and just guess what this one means.
I didn't think there could be one more juvenile synonym for penis on UrbanDictionary until I saw the entry for "p-nas."
by g-nas June 13, 2008
 
4.
pna
player dna; what makes a character a character in an MMORPG/mud/mush/etc.
P1: How do you cast purple fireballs?

P2: it's in my pna.
by phillydrifter June 12, 2006
 
5.
PNA
short for pretty naughty angel
She's a pna - She's a pretty naughty angel
by DannyDK March 12, 2008
 
6.
pna
wat alex has in his pants
alex has pna in his pants
by josh kupper May 09, 2005
 
7.
Psychiatric Nursing Assistant.

Someone who takes care of developmentally challenged people for a living, and assists in their daily life.
P.N.A's do all the dirty work.
by plap2 November 21, 2008