According to the Advanced Oxford Learner's Dictionary (7th Edition; electronic version) an inuendo is:
1) An indirect remark about somebody or something, usually suggesting something bad or rude.
2) A baseless invention of thoughts or ideas.
3) It can also be a remark or question, typically disparaging (also called insinuation), that works obliquely by allusion. In the latter sense, the intention is often to insult or accuse someone in such a way that one's words, taken literally, are innocent.
4) The term sexual innuendo has acquired a specific meaning, namely that of a "risque" double entendre by playing on a possibly sexual interpretation of an otherwise innocent uttering.
Many television shows aimed at a younger audience frequently use innuendoes as a way of attracting older viewers without offending their network's censorship. Shows such as Spongebob Squarepants, Rocko's Modern Life, Cow & Chicken, Ren & Stimpy and especially Animaniacs have been known to do this over the years.
Many songs may also use innuendos, such as Led Zeppelin's The Lemon Song.
