Top definition
When nipple's aren't erect they are inverted or sunk into the breast, much like a crater.
"It was so cold last night I got Crater Nips!"
by TheMystic September 26, 2013
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug