NIP, NIPS, or nip may refer to:
- NIP (model theory), a property of theories in mathematical logic
- Conference on Neural Information Processing Systems, a computational statistics conference held annually, usually in Canada
- Naval Intelligence Professionals, an association of active duty, retired and reserve officers, enlisted personnel, and civilians who serve or have served within the Naval Intelligence community
- Network Intrusion Prevention System, appliances that monitor network and/or system activities for malicious activity
- Ninjas in Pyjamas, an electronic sports team
- National Immunization Program, a part of the Centers for Disease Control and Prevention, located in Augusta, Georgia
- New Ideal Public School, a school in Mathura, India
- Numer Identyfikacji Podatkowej, the tax identification number in Poland
- Nip, a unit used in alcohol measurements
- Nip, a word for Japanese people
- Short for nipple
- Nip, a range of Hamburger sandwiches at the Salisbury House (restaurant) chain in Winnipeg, Canada