A situation conducive to masturbation, that is to say, the perfect opportunity to pleasure oneself.
Archibald Crunk: Geez, I was so bored on Saturday. My room-mate was out of town, all of my friends were at the party, and there was nothing good on television.
Zedekiah Bigguns: Sounds like a perfect fapportunity to me, dawg.
A moment during a media experience when the viewer is propted to masturbate. I.E. a gratuitous movie scene or a video game gesture that pauses perfectly.
Finding the model viewer mode in Arkham Asylum proved to be a lovely fapportunity.