number twon. Informal 1. The act of defecating.2. Feces.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.number two n 1. euphemistic the act or an instance of defecation 2. (Hairdressing & Grooming) a haircut in which the hair is cut close to the head with an electric shaver Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014