1) The act of masturbating while pressing the f5 key on your keyboard as a means to update the page if new content is posted.

2) Pressing f5 while fapping to get the next page in the series, commonly hentai.
Poster of the Hentai: Is anybody actually reading this?
Anon1: fap5fap5fap5, yeah, we're here.
Anon2: Sorry, been fap5ing the whole time.
by MaceDragon December 8, 2010
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