Anything that helps a person perform self-gratification (i.e. masturbate). These materials range from magazines to movies, but not limited to inanimate objects (i.e. the use of one's own imagination).
by Elmer January 05, 2006
1 more definition
Your mother's picture.
Hey Mike, could you please hand me my masturbatory aid...I'm gonna go beat off.
by danielle April 09, 2007