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demonic, ghost-like entities heard to be seen after listening to music for long periods of time, usually heavy/thrash/death metal

also: what seems to be the first real lyric in the song Ruin by Lamb of God
"HOLY SHIT last night i was listening to music when out of nowhere i was attacked by all these falaylays! they were fucking everywhere! it freaked me out!"
by jacob chamberlain June 11, 2008
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