look up any word, like dirty sanchez:
 
1.
A third/very very small nipple
Joe:whoa what the helll is that??

Billy:oh that's just my niplet.
by Toast nhamm May 03, 2009
 
2.
erect and very hard nipples.
Hey man is it cold? Because you got a serious case of the niplets.

Shit! Look at that chicks niplets!

by martinotots September 02, 2008
 
3.
a nipple with a small aereola around it.
That is my niplet.
by bread infection November 27, 2009
 
4.
i loosely translate it as part of the nipple which isnt the lump...

*drunken word i made up and kept shouting while running around tg park naked, and covered in whipped cream*
i have large niplets

my niplets are on fire

i have ginger niplet hair

my dog ate my niplets

(there are numerous examples)
by tommy-joe moore September 01, 2004