Dictionary.com
definitions

toilet soap

noun
  1. a mild and usually perfumed soap for washing the hands and face and for bathing.

Origin of toilet soap

First recorded in 1830–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for toilet soap

toilet soap

noun
  1. a mild soap, often coloured and scented, used for washing oneself
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012