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1.
with no pressing need to jack off, just a tempting curiosity, a slow wank begins; a simple, solitary pulse.

before long, the fapping encourages more, stronger, and quicker fapping to climax at an orgasm

similar to a slow clap, wherein a single clapper slowly encourages more claps to climax in a full ovation
"The other day I slow fapped to the View. It was weird."
by Mike P Dobbins February 20, 2009
 
2.
just like the slow clap, but instead of clappin', everybody's fappin'.
it was halftime and we were losing big. in an effort to boost morale, craig started a slow fap. before we knew it, every one of us blew our loads. we lost 77-6.
by mrtuggles July 02, 2013