Nipples that instead of sticking out, they indent. Like dimples.
commonly found on:
1) babies and toddlers
2) adolescent boys
high school head cheerleader: "dude have you seen the junior high boys swim team?? THEY ALL HAVE NIMPLES!!!!"
head cheerleader's bitch: "awww how adorable!"
When a girl/woman has no breasts. She is so flat her nipples are concave, looking like dimples.
She doesnt have tits, she has nimples!