live wire

[ lahyv ]

noun

, Informal.

1. an energetic, keenly alert person.

live wire

/ laɪv /

noun

1. informal.
   an energetic or enterprising person
2. a wire carrying an electric current

Word History and Origins

Origin of live wire¹

An Americanism dating back to 1900–05

Idioms and Phrases

A highly alert or energetic person. For example, Sally's a real live wire; she brightens up any gathering . This metaphoric term transfers a wire carrying electric current to a lively individual. [c. 1900]

Example Sentences

Nick says other issues have included the wrong windows being installed twice, heat loss issues, and bare live wires hidden behind a wall.

From BBC

Meanwhile, county officials have launched boats to save stranded people and sent out warnings that the flooded water could contain live wires, sewage, sharp objects, and other debris.

From Salon

The power to the pylon should have been switched off while the work was carried out because it was impossible to maintain a safe working distance from the live wire, Cardiff Crown Court heard.

From BBC

Video showed people scrambling as the snagged line triggered a cascade of events with several utility poles and a transformer falling near the grandstands, and live wires on the ground.

From Seattle Times

At One Madison, a high-rise under construction on 23rd Street in Manhattan, workers face dangers daily: live wires, electrical hazards, heavy machinery.

From New York Times