dad joke; corny joke; bad pun
A lame pun or corny joke, typically associated with middle-aged men. Often involves wordplay that is considered unfunny or embarrassing by younger people.
My dad cracked another dad joke, and the whole family gave a wry smile.
His corny joke was so lame that nobody laughed.
Katakana spelling is common and matches usual-kana usage. The hiragana reading is normalized.
Mixed hiragana-katakana spelling, also seen in practice.
Kanji spelling exists but is uncommon; the word is usually written in kana.
Compound of 親父 (おやじ, 'dad, middle-aged man') and ギャグ ('gag, joke'). The term became popular in the late 20th century to describe the stereotypical unfunny puns made by older men.