cackle-bladder

Alternative forms

 * cackle bladder

Etymology
, because originally chicken blood was used.

Noun

 * 1) A bladder containing (real or fake) blood, used to fake someone's death or injury, as in espionage or confidence tricks where a person is made to think that he is an accessory to murder.
 * 2) * 1951 June 16, Racket Squad (television review), in The Billboard, page 8,
 * It tells you how they work on the mark's own larcenous cravings for a killing, how they build him up to betting his entire stake — and then "put the chill on" via the "cackle bladder" routine, a prop murder, so named because originally the "corpse" bit on a chicken bladder and drenched himself in chicken blood.