As a Noun: 1. Waste matter discharged from the intestines through the anus. Used especially when talking to children. English = poo, poo-poo. 2. An unpleasant and strong smell; a foul smell. English = odour. As a Verb or Adjective: 1. To discharge waste matter from the intestines through the anus. Used especially when talking to children. English = poo, do a poo. 2. Of something, to give off or produce a very strong and foul smell. English = stink, reek.