"biting, sharp," 1898, colloquial, in reference to a "biting" chill in the air, from nip (n.2) + -y (2). Related: Nippiness.
a nippy cheese
a nippy fall day
niobium
nip
nipper
nipple
Nipponese
nippy
nirvana
nisei
nisi
nit
nite
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