DOO-DOO Meaning of DOO-DOO in English nounalso do-do ˈdü(ˌ)dü ; or doo or do ˈdü( plural doo-doos also do-dos or doos or dos )Etymology: baby talk: excrement — used as a euphemism Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012