Sly Suggestion is a term used to describe a subtle or indirect suggestion, usually with a hidden meaning. It can be expressed in two ways: INSINUATION (11 letters) and INNUENDO (8 letters). INSINUATION is a subtle hint or suggestion that implies something without being explicitly stated, while INNUENDO is an indirect or subtle remark that often has a double meaning. Both terms are used to imply something without directly saying it.