A fallen angel is a wicked or rebellious angel that has been cast out of heaven. The term "fallen angel" does not appear in the Bible, but it is used of angels who sinned (such as those referred to in 2 Peter 2:4, "For if God did not spare angels when they sinned, but cast them into hell and committed them to chains of gloomy darkness to be kept until the judgment ..."), of angels cast down to the earth in the War in Heaven, of Satan,demons, or of certain Watchers. The term has become popular in fictional literature regarding angels.
Mention of angels who descended to Mount Hermon (not "fell" to Earth) is found in the Book of Enoch, which the Ethiopian Orthodox Church and Eritrean Orthodox Tewahedo Church accept as canonical, as well as in various pseudepigrapha.
(Dennis DeYoung)
"Hell, nobody's perfect
One hundred percent
No saint, no Pope, no King no Queen
No President
But our hunger for heroes
Has made us blind
We seek salvation
From the cup of human kind
But every time we hear the voice
Of some new Abraham
We wake too late to realize
It was just another scam
Fallen angel, fallen angel
Well I guess you were no angel after all
Fallen angel, fallen angel
You always take us with you when you fall
I said nobody's perfect
From head to toe
Not Einstein or Elvis or Lenin or Marx
Or Marilyn Monroe
Cause it's mostly illusion
In flesh and bone
An image, a look, a song or a book
That we all claim for our own
But even in the best of us
There lies beneath the skin
The tragic flaw in nature's law
That's bound to do us in
Fallen angel, fallen angel
Well I guess you were no angel after all
Fallen angel, fallen angel
You always take us with you when you fall
Pretty faces up on the silver screen
Flawless bodies on covers of magazines
They all look perfect to us
So rich and cool and bored
But hold the presses boys
They've checked into Betty Ford
Turns out nobody's perfect
From "A" to "Z"
It's best to follow your heart
Then to follow me
Cause I'm only a singer
Playin' a song
And I've just been making it up
As I went along
See I met a man who told me once
"Sincerity's the key
And once you learn to fake it
Son you're gonna be home free"
Fallen angel, fallen angel
Well I guess you were no angel after all
Fallen angel, fallen angel