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1.
a word used to describe something that isnt very nice.
for example, "that girls top is naggy" or "this food is naggy"
by the ste June 05, 2006
 
2.
A person who laughs all the time and is very happy, shes very beautiful too and has the best friends usually named Bugsy. its a nickname for someone who is on top of the world, it also rhymes with baggy. like when you go to wawa and buy a brownie you can say ( see example below).
"Ohh Naggy! grab yourself a baggy!"
by yadashina February 25, 2009