b)dine out on somethingTELLBritish EnglishBrE informal to keep using a story about something that has happened to you, in order to entertain people at meals 总是把〔自己的〕某件事作为饭桌上的笑谈
Examples from the Corpus
dine out on something• You can spend it, you can dine out on it.• For years I dined out on these stories.
dine• Diningalone this evening?• You insisted I must wear this to dine, and I am certainly not going to change again now.• We dined at the Ritz.• The representatives of shire and suburb had arrived on the Monday evening, and had drunk and dined exceedingly well.• Adjacent to the hotel, guests may dine in the livelygardenrestaurantoverlooking the river.• Guests dined on sea bass and saffronpotato mousseline.• It's a place where the famous can dine out and not be bothered.• I have received an invitation to dine with the Mayor.
Origindine
(1200-1300)Old Frenchdiner, from Vulgar Latindisjejunare“to eat after not eating for a time”