Meatsuit

Your Dad – he’s in here with me. Trapped inside his own meat suit. He says “hi”, by the way. He’s gonna tear you apart. He’s gonna taste the iron in your blood. – Azazel while possessing John Winchester, 1.22 Devil's Trap

Term for the bodies possessed by a demon. Originally used by demons such as Azazel and the Meg, but later used by Sam, Dean and Bobby. One key difference between angels and demons regarding possession: angels require the consent of their human vessels, demons do not.

See also Vessel, Possession.