This book constitutes an in-depth corpus-based study on the use of emotive interjections in Present Day British English. In a novel approach, it systematically distinguishes between child and adult speakers, providing new insights into how they use Ow!, Ouch!, Ugh!, Yuck!, Whoops!, Whoopsadaisy! and Wow! in everyday spoken language. It studies in detail their acquisition by children and pinpoints changes and developments in their use throughout early childhood. The study highlights particularities displayed by child and adult speakers in general and identifies crucial differences regarding how adults use emotive interjections depending on whether they are interacting with children or other adults. This book thus offers an exhaustive overview on the functions of emotive interjections based on thorough empirical research.