Books & Authors Gadzooks and Yadda Yadda NPR Published March 15, 2005 at 9:00 PM PST Twitter LinkedIn Email Listen • 0:00 Zounds!: A Browser's Dictionary of Interjections explains where a few of our favorite filler words come from. English, having the most words, has the most interjections, and the lexicon is growing daily. Copyright 2005 NPR