"I'll be pounce pony, phoney maroney,
pony before the cart."
A pounce pony (or goat or other animal) is set out as bait to
trap a carnivore, which is then killed. It is a sacrificial animal.
* From the traditional song "Boney Maroney", via Patti
Smith's Horses album. [Ron
Henry] * To put your horse before your
cart is to have things (often, to have priorities) in the wrong
order, screwed up. [Chris
"a scapegoat falls to climb"
A scapegoat is one who takes the blame for others' offenses.
* A live goat over whose head Aaron confessed all the sins of
the children of Israel on the Day of Atonement. The goat, symbolically
bearing their sins, was then sent into the wilderness. [American Heritage Dictionary]