Cuz your nipples get hard

lol---if you saw my better half in a cold breeze you would have you answer---cool question-have some points-smile and enjoy the night

It comes from nip- bite or sharp, like bitingly cold

nippy rather chilly http://encarta.msn.com/encnet/features/dictionary/DictionaryResults.aspx?refid=1861683440 A nip in the air is a feeling of cold: "There's a real nip in the air this morning." http://dictionary.cambridge.org/define.asp?key=nip*2+0&dict=A pleasantly cold and invigorating "crisp clear nights and frosty mornings"; "a nipping wind"; "a nippy fall day"; "snappy weather" crisp frosty nipping nippy snappy http://www.dicts.info/define.php?word=nippy noun INFORMAL a nip (in the air) If there is a nip in the air, the air outside is quite cold: You can tell winter's on its way - there's a real nip in the air in the mornings. nippy adjective INFORMAL describes weather or air that is quite cold: It's a bit nippy today - you might need a coat. http://dictionary.cambridge.org/define.asp?key=53776&dict=CALD http://www.wordsmyth.net/live/home.php?script=search&matchent=nippy&matchtype=exact 1. Tending to nip: an exuberant, nippy puppy. 2. Sharp or biting: nippy cheese. 3. "Bitingly" cold: a nippy fall day. http://www.bartleby.com/61/36/N0113600.html Nippy is the derivative word for when a person goes outside and their nipples become erect from the cold. http://www.urbandictionary.com/define.php?term=nippy