Live Wire Meaning

(idiomatic) An especially energetic, alert, or vivacious person.

Example: 2006, "Two boys electrocuted," The Hindu (India), 27 Sep. (retrieved 24 Dec. 2008):
  Two boys got electrocuted when a live wire fell on the auto-rickshaw in which they were sitting.
1927, "Will Not Go," Time, 19 Dec.:
  Mr. Black is a kindly, gentle, fine individual, but as a leader, an up-to-date fellow, a go-getter—why he just doesn't know the first thing about it. . . . In a growing community like Douglaston we need a live wire.
2007, Charlaine Harris, Real Murders: An Aurora Teagarden Mystery, ISBN 9780425218716, p. 95:
  She was irresistible—a laughing, chattering live wire, never at a loss for a word.