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1.
When something is so epic and so awesome that you want to fap profusely to it, then the word for such a masturbation is fastfap.
That video made me fastfap for 2 hours.
by Double-yew Thirteen June 16, 2011
 
2.
Ot is when you fap super fast so your dick sets on fire.
Look he is fapping
No, he fast fap
by AcidMan May 14, 2014