1. on impulse; without premeditation; - Example: "he decided to go to Chicago on the spur of the moment" - Example: "he made up his mind suddenly" [syn: on the spur of the moment, suddenly]
WordNet (r) 3.0 (2006):
on the spur of the moment
adv 1: on impulse; without premeditation; "he decided to go to
Chicago on the spur of the moment"; "he made up his mind
suddenly" [syn: on the spur of the moment, suddenly]