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1.
Spanish word to describe a young, rebel & global generation only interested in party, no job, no study, only party.
You:
You know what a Nini is?

Me:
Monday.... Party.
Tuesday.... Party.
Wednesday.... Party.
Thursday.... Party.
Weekend.... PARTY.
by Lishamb November 25, 2011
 
2.
Slang in Mexico for a young person that 'ni estudia, ni trabaja' ... in other words, someone that doesn't study, and doesn't work. Just sorta bums around all day, and lives off their parents' money.
Ese nini no hace nada, solo pasa todo su dia en la playa.

That nini doesn't do anything, he just spends all day at the beach.
by hibore222 April 23, 2011
 
3.
Spanish slang term used for describing a generation of youth (between 16-35 years old) that neither studies nor works.
No ocupation at all, they usually leech their Parents' resources.
This word is originated from the conjunctions used in this sentence: "NI estudian NI trabajan".

Plural form is "ninis", can be written as ni-ni or nini.
In Spain, statistics show that generation ni ni is formed by more than 700.000 individuals and growing.

España es el segundo país europeo con mas ninis.

Me preocupa la generación ni-ni, es nuestro futuro.
by Wothanfja December 19, 2010
 
4.
Slang for "night night"
Ni ni guys!
by arnoldjrimmer November 06, 2010
 
5.
Also known as a fairy, a lady garden, vjayjay, bearded clam, beaver, vertical smile, rattlesnake canyon, love glove, hump hole or fun hatch.
My nini is so juicy juicy.

My nini tingled as he walked by.
by Lawsonslegs September 07, 2014
 
6.
Nini derives from 'night, night' when saying goodbye to someone online. First used in 2002 by my cousin Sam.
"hey boo, gotta go. nini"
by serena January 08, 2005
 
7.
damn, those ninis are smaller than my fist!
by Mattwick December 14, 2004