1 definition by ilikemoney1480

Top Definition
Stands for 'hard nipple weather.' Used most often when a person's nipples are visible through their shirt.
"Did you see that girl's nipples? She definitely had a reaction to some HNW"

"Whoa look at his nipples... He must be experiencing some HNW"
by ilikemoney1480 November 21, 2009

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