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1.
When an older woman with less then firm boobs is lying down and her nipples end up in her arm pits.
Once Old Man Johnson took off the GILFs bra, he noticed she had nipple pits and immediately became aroused.
by Mister Wunderful October 17, 2007
 
2.
When an older woman with less then firm boobs is lying down and her nipples end up in her arm pits.
Once Old Man Johnson took off the GILFs bra, he noticed she had nipple pits and immediately became aroused.
by Mr. Wunderful November 06, 2007
 
3.
When ones nipple is so long that it flops over onto the boob to form a pit, much like that of an arm pit.
"Man, that girl's nipplepits were smelly."

"She really needs to get some deodorant for those nipplepits."
by nipplepitlova November 15, 2011