An in depth look at ventilator associated pneumonia in trauma patients and efforts to increase bundle compliance, education and documentation in a surgical trauma critical care unit ScienceDirect What does VAP mean? Definition of VAP VAP stands for Very Annoying Person. By AcronymsAndSlang.com Confused about Voluntary Acknowledgment of Paternity (VAP)? It's a common way to establish paternity, often done right at the hospital. Here's what you need to know: 1 What Is VAP? It's What is VAP? (Ventilator Associated Pneumonia) Medical Definition Ventilator associated pneumonia PPT