The dad joke is a pejorative term used to describe a corny, unfunny, or predictable joke, typically a pun. Generally inoffensive, dad jokes are traditionally told by fathers among family, either with sincere humorous intent, or to intentionally provoke a negative reaction to its "dagginess". One of the most common "dad jokes" goes as follows. A child will say to the dad, "I am hungry." To which the dad will reply, "Hi Hungry, I am dad." Many dad jokes may be considered anti-jokes, deriving humour from an intentionally unfunny punchline.
The term has spread into general use, receiving mentions in Australian quiz show Spicks and Specks, and American sitcom How I Met Your Mother.
References
Dad joke Wikipedia(Text) CC BY-SA