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a person who downloads audio files illegally for the purpose of mixing them together and releasing them back onto the internet.
I see the mixstas have been at it again.

Dave's pathetic. He's a wannabe mixsta.
by Phil Blankenship February 03, 2008
Someone who takes downloaded MP3s or other audio files and mixes them together.
That guy mixes some really good tunes. He's a real mixsta.
by Peter Harrison February 02, 2008