a small, wireless microphone worn inconspicuously by an actor, singer, or other performer to amplify the voice without inhibiting mobility.
bod•y-mikePronunciation: (bod'ē-mīk"), [key]
—v.t., -miked, -mik•ing.
to equip with a body mike: The star was body-miked, but he was still inaudible.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.