Synonyms of 'on the spur of the moment'
▷ See spur
on impulseDictionary, without thinking, impulsively
If you do something on impulse, you suddenly decide to do it, without planning it.
They admitted they had taken a vehicle on the spur of the moment.
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Thesaurus for on the spur of the moment from the Collins English Thesaurus
If you do something on the spur of the moment , you do it suddenly , without planning it beforehand .