soft soap

(noun) flattery designed to gain favor. Synonyms: blarney, coaxing, soft soap, sweet talk.

(noun) a soft (or liquid) soap made from vegetable oils; used in certain skin diseases. Synonyms: soft soap, green soap.

(verb) persuade someone through flattery. Synonyms: soft-soap.

(verb) use flattering talk on somebody. Synonyms: soft-soap.