Soft soap Look up soft soap or soft-soap in Wiktionary, the free dictionary. Soft soap may refer to: Soap that is liquid or easily soluble, usually made by saponification with potassium instead of the more typical sodium hydroxide Softsoap, trade name of a liquid soap product Topics referred to by the same term This disambiguation page lists articles associated with the title Soft soap.If an internal link led you here, you may wish to change the link to point directly to the intended article.