IMPULSE

impulse,n. A sudden urge or inclination that prompts an unplanned action.

uncontrollable impulse.An impulse so overwhelming that it cannot be resisted. • In some jurisdictions, an uncontrollable impulse serves as a defense to criminal conduct committed while in the grip of the impulse. See IRRESISTIBLE-IMPULSE TEST. [Cases: Criminal Law 50.]

[Blacks Law 8th]