on the spur of the moment

Idioms  

1. Impulsively, without prior preparation, as in He decided to join a tour to England on the spur of the moment. This expression alludes to the goading action of a spur to a horse. [Late 1700s]

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Example Sentences

Lassen may well have conceived of his sandwich on the spur of the moment, but at that point many U.S. businesses were serving hamburgers.

From Washington Post

The main character, Allie Fox, is still an underemployed genius and a crackpot inventor, who on the spur of the moment transports his family to Latin America.

From New York Times

It became nothing, Thomas said, for Williams on the spur of the moment to pick up Thomas’s son and take him to a shoe store, a restaurant or Six Flags.

From Washington Post

George's instincts were to risk everything on the success of a quirky idea which he had thought up on the spur of the moment.

From BBC

They can stop by on the spur of the moment and pick up lobster mac ’n’ cheese, cheddar-panko pork chops, braised bone-in beef short ribs, garlic-herb chicken roulade or smoked pork tenderloin.

From Washington Times