1. National Fire Protection Association. A standards and "best practice" body for the fire service. 2. Slang: Not For Practical Application. This is firefighter slang referring to the seemingly ‘useless’ regulations of the NFPA. This phrase is commonly used by rural fire departments whose chiefs or officers operate by traditional methods, instead of "by the book" 3. Slang: No Free Publications Available, referring to publications that "all are encouraged to practice" yet are prohibitively expensive, as in "That standards document is NFPA." The NFPA slang is typically used in smaller fire departments, where such a purchase is a non-reimbursed out of pocket personal expense.