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1.
Masturbation material. Something which people will only use for masturbating purposes and nothing but.
"Have you seen Linsey's Myspace pics? Pure fap material right there."
by Animated May 16, 2009
 
2.
Noun. usually pornographic media intended for the use of masturbation. Fap being the verb to masturbate.
"Do you know where I can get some decent fap material?"
"Um... try fapmaterial.com"
by A.Fapper July 17, 2012