shaggy-dog story
noun/ˌʃæɡi ˈdɒɡ stɔːri/
/ˌʃæɡi ˈdɔːɡ stɔːri/
- a very long joke with a silly or disappointing ending
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shaggy-dog story
Definition of shaggy-dog story noun from the Oxford Advanced Learner's Dictionary