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The vocal effect produced by a person that sounds like a pig squealing or the noise a pig makes when snorging. This style of screaming is popular in Metal.
Used in a sentence.....

"Those swine vocals were fucking brutal!"

Listen to the song All Roads Lead to Hell by Hester Prynne on youtube to hear some Swine Vocals
The Swine starts around 0:28
by SwineFLUpandemic November 09, 2009
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