A euphemism for a specific style of hentai pornography that involves giant monsters with long wriggly masses of tentacles.

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)

A humorous slang term for the act of being raped by tentacles. See tentacle porn, hentai.

The etymology of the phrase comes from the idea of being force fed spaghetti, which resembles the tentacles, and the term breakfast which is sometimes used as a code word for sex. The breakfast thing really just indicates taking the noodles inside of yourself, normally in the case of eating, but in this case, not eating. People automatically realize that the phrase is not, in fact, referring to eating spaghetti for breakfast because of the unusual nature of such a meal.