When a person uses their Instagram solely or mostly to stalk (sometimes follow) members of the opposite sex and fap to them.
Tom has got quite the fapstagram. He doesn't ever upload any pictures, but take a look at his search history; they're all women.
by longshottie August 15, 2013
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When a person (mostly guys) uses a social media platform (in most cases Instagram, but also Twitter or even Facebook) solely or mostly to follow girls (rarely also guys) and try to send them dick pics or stalk them and fap to their shared pictures. Since the increasing availability of Internet in Arabian or African-Countries or in India there has been an significant increase of the Fapstagram-Phenomenon.

Also decribes a Livecam Site called www.fapstagram.net
Eww... another DM from such a obscure Account. He ask for Nudes and only follows girls, seems like another case of Fapstagram.
by Zephirx August 12, 2020
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