Top definition
The state of having hard nipples; when one's nips are visibly protruding into the fabric of one's shirt. Both men and women are able to krooz.
"I'm kroozin, it's so cold in here!"

"Hey, Megan, look! I'm kroozin!"

"That girl is kroozin so badly. I think she needs a better bra."
by Rahhhhh May 13, 2007
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