a substance used for washing and cleansing purposes, usually made by treating a fat with an alkali, as sodium or potassium hydroxide, and consisting chiefly of the sodium or potassium salts of the acids contained in the fat.

any metallic salt of an acid derived from a fat.

Slang . money, esp. as used for bribery in politics.

Slang . Also, soaper. soap opera.

to rub, cover, lather, or treat with soap. ?

no soap

Informal . no go

He wanted me to vote for him, but I told him no soap.

adjective

saponaceous , soaplike , soapy

noun

castile , cleanser , detergent , lather , suds , wash

verb

saponify