Definition of "Nip"

Nip

/nɪp/

noun
plural Nips
1. (dated, slang, offensive, ethnic slur) A Japanese person.
  Quotations
  CHUNGKING, Oct. 10—Chinese counterblows against the Japanese offensive in south China have reeled the Nips back from two towns in the approaches to Kweilin, capital city of Kwangsi Province, today’s Chinese High Command communique announced.
  1944 October 11, “Sino Counterblows Send Nips Reeling”, in The Stars and Stripes Mediterranean‎, Italy, page 1
adjective
not comparable
1. (dated, slang, offensive, ethnic slur) Japanese.