(noun) One of those girls that you always see at college parties who is between the ages of 15 and 18. One second she is up and about and yelling "its my song!", the next she is puking or making out with a 30 year old.
by bayneofitall February 20, 2013
 Get the Ninnymug.
Get the Ninnymug. Southern slang. None. A null set. Generally incorporated to complete a sentence defining being without.
by jiminton July 28, 2012
 Get the Ninniemug.
Get the Ninniemug. by Mr. Duffy January 19, 2008
 Get the ninnymug.
Get the ninnymug. 1.a set of useless tits. (any tit that does not produce milk)
2.man nipples
3.also used to describe super slow people, or people with no common sense
2.man nipples
3.also used to describe super slow people, or people with no common sense
ex.
1.That old ladies tits are about as useless as ninnies on a boar hog.
2.damn, did you see the ninnies on Tyrone? Homeboy is smugglin' raisins!
3.Those new guys are complete ninnies.
1.That old ladies tits are about as useless as ninnies on a boar hog.
2.damn, did you see the ninnies on Tyrone? Homeboy is smugglin' raisins!
3.Those new guys are complete ninnies.
by whtrice January 2, 2011
 Get the ninniesmug.
Get the ninniesmug. by Kayla Sue September 28, 2008
 Get the Ninniesmug.
Get the Ninniesmug. Current/former Nine Inch Nails fans (hence, the "NIN" part of "ninnies") who originally met through the Net  (old-school ninnies trace their roots to the alt.music.nin Usenet newsgroup, while more recent converts have been acquired through IRC, Live Journal and dating/marrying other ninnies), and who now get together periodically to consume prodigious amounts of meat, alcohol and curiously strong brownies, wear Reznor heater shirts and bondage gear, perform cutting-edge karaoke, and comandeer hotel lobbies 24/7 for shooting the bull, freaking out mundanes, making more bad in-jokes than was previously thought humanly possible, and impersonating N'Sync roadies.
by Robin the mad photographer January 30, 2005
 Get the ninniesmug.
Get the ninniesmug. by Urbaaaaannnnnnnn May 6, 2020
 Get the Ninnymug.
Get the Ninnymug.