Combination of "fap", meaning to masturbate, and "apocalypse".
When so many people are simultaneously masturbating that it brings about the apocalypse.
God is supposedly omnipresent, which means he sees all, all the time. Fapture occurs when there are so many people simultaneously masturbating that God can no longer stand to see it all and comes back to tell everyone to knock it the hell off.
Did you see Jessica last night? She's so hot I swear she'll cause the fapocalypse.
1.) An online fitness community combining latent gamer tendencies with popular health and fitness regimes and trends with the purpose of creating an unstoppable army of freakishly fit nerds that do a lot of virtual fist-bumping.
2.) An amalgamation of the terms "Fitness", "Ocular" and "Racy" that describes an online social health and fitness-minded community of individuals who work out and take pictures of themselves mostly naked so as to show others, gain followers, and thus become propular. Also see "fitness pr0n".
1.) "Dude, I just leveled up by completing this quest AND I earned an achievement!" "Are you playing Skyrim?" "Pfff...NO! I'm playing Fitocracy, so now I LOOK like the guy in Skyrim!" "No way!" /fistbumpRLprops
2.) "What does NSFW mean?" "I forget..." clicky "Holy crap did you see that guy/girl's {insert flexed/shapely body part of choice}?!" "Yeah. Wow. We should follow that person and start doing squats. Right now."