Say that again?

mouthNPO…what?
Medical Terminology Deciphered: NPO
NPO is a medically approved abbreviation that means NOTHING BY MOUTH. The abbreviation is based on the Latin translation of nil per os meaning nothing by mouth.

Read more here thanks to the Orthopedic Team at Bellin Orthopedic Surgery Center: http://bellinosc.com/blog/medical-terminology-deciphered-npo/