spur of the moment
[adjective]
Synonyms: extemporaneous, auto-schediastic, extemporary, extempore, impromptu, improvised, offhand, unrehearsed, unstudied

[TahlilGaran] English Synonym Dictionary ▲

ˌspur-of-the-ˈmoment adjective [only before noun]
a spur-of-the-moment decision or action is made or done suddenly without planning Synonym : spontaneous

[TahlilGaran] Dictionary of Contemporary English ▲

spur-of-the-moment
on the spur of the moment - if you do something on the spur of the moment, you do it suddenly, without planning it.
We hadn't planned to get married - it was a spur-of-the-moment thing.
(always before noun)

[TahlilGaran] English Idioms Dictionary ▲

spur of the moment
on a sudden wish or decision, suddenly
We decided to go to Hong Kong on the spur of the moment.

On the spur of the moment I bought a new bicycle.

[TahlilGaran] English Idioms Dictionary ▲