What's that gooey green substance coming out of the possessed victim's mouth during exorcism?

Demonic Dung

(don't mess with it, it has to be Taken Care Of)

Listen, when Jesus cast the Demons out of 1 man, and they went into the Pigs---

the Pigs had better sense than to Put Up when them, and ran into the River in order to Get Away from them.

O.K. Listen again: when those Demons (and all of them are Insane) entered into the Pigs, that Insanity caused the Pigs to do an Insane Thing----

they Killed Themselves in Order to "Get Away from those Demons"

and that is what Human Beings do sometimes Too---and that is a Very Sad Thing.

Call out to Jesus----Get DELIVERED----Jesus WILL Help YOU---don't Kill YourSelf, it is Not Necessary to Kill yourself, in order to be FREE from "demons".

Ditto.

You are asking this in the wrong section. That's the specialty of the special effects people in movies. Possession is only a movie premise. Not real.

Demons are not fallen angels but are the past life energies of the dead brought up out of sheol (complete sleep) by those who break God's word and practice the occult. Because the living have power over the dead when these past life energies are brought up and they possess someone the possessed suffer because the dead are not able to repent and change they are unable to deal with present Life and also if they were evil and died evil and terrible deaths the possessed will experience the same kind of emotions they experienced at their death. Unless one repents they will curse their self and everyone else that listens to them.

There are no fallen angels the Devil was Cain the first murderer and liar in the bible and his angels are his offspring who prove who they are by murdering and lying. There have been a couple of the descendants of Cain referred to as the devil because before God there is no time and all seeds are one before Him. One of Cain's descendants was also a priest in the temple and he was the one who tempted Jesus. Angels cannot temp anyone because they do not have flesh and do not know temptation. Satan which an angel of the LORD some times is used to test (not tempt) so he was sent by God to test Jesus in this flesh and for that reason he used a descendant of Cain the Devil.

In the movie with Linda Blair, it really was nothing but cold pea soup.

Isn't that the weird goo that was in Ghostbusters 2?

Mint jelly from all of the lambs that were sacrificed as burnt offerings in antiquity.

Leftover slime from You Can't Do That On Television

It is supposed to represent fetid pustulance.

All the boogers they've been saving up.