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1.
1) To flagellate ones genitals 2) to masturbate in a rape like fashion 3) to attack ones own penis/vigina in a personal act of selflove; also spelled Mastrate in certain circles

originated in a PowerQuee song titled: Beatin it Off in a Darken Room
that N-Word Jim nearly lost his dong mastraiting under the pull out couch; Joey's a heavy Mastraitor when ever his sister comes into town; in my coven we mastrait to PowerQuee Lyrics while Jeff the high exalted one shoots his load over us like in that movie: American Pie Naked Mile; that gutter tripe Liz was arrested for public mastraition in the park last week!
by Cosmic Pope October 27, 2010