Real definition: an Italian dish made of stacked layers of thin flat pasta alternating with fillings such as ragù and other vegetables, cheese, and seasonings and spices such as garlic, oregano and basil.
A word or phrase embedded in culture used as a shorthand or quirk of speech. Common examples vary, as slang in the United States is constantly dying and starting. Slang is short for Short Language, although often manifests as made up words that have barely any relation to their base word.
Jimmy: “Yolo, yeet, poggers”
Grandpa:”Stop it with all that slang you whippersnapper!”