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Material that can be used to aid in masturbation. Normally used to refer to a mental image or memory, but can include video and printed material.
Hey, she might only be 14, but there's nothing illegal about using that as Wristfuel!

Person1: Yo check out that pidgeon over thurr
Person2: Yeah shame about the face but the rest is pure wristfuel
by bootstrap18 February 03, 2006
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