The act of hanging someonbody upside down from your bedroom ceiling naked, while you go fishing up their arsehole. You can call it a Charlie Benjamin Fisher if you catch a real fish from their arsehole.
A woman who has sex with her ex boyfriend the day after she breaks up with her current boyfriend, or a woman who shows her breast to get a man to go swimming
A.Fish is a dirty whore he cares about no one but herself and has sex with her ex boyfriends a day after breaking up with there current one.
It's when you can see the full outline of a dude's bell-end through the fabric of whatever he's wearing on his undercarriage. Because this spectacle ALWAYS looks like an actual fish eye. This is the truest meaning of the term because it is so common and so hilarious. Fellas, you thoughts you'd pulled the wool over with your tales of jizzing in our eyes but look down next time you're wearing your softest jim-jams, and there he is, finding nemo.
NB: Fish eye is most notable in the circumcisedcommunity, it also features heavy in those belonging to the 'well-endowed' faction.