A really close friend who secretly hates on you or wishes for you to not succeed in anything. This person usually will not show that they are hating on you to anyone and will be perceived as a really good friend to you. They also might try to keep you down or assist in your failures secretively. Or have malicious thoughts of what they could do to make your life miserable.
Mary: (pulls up in her new car outside Janes' house) "I finally got my new car!! Wanna go for a ride!!??"
Jane: "Hell yeah!!!" she shouts in delight. But Jane is really thinking she wishes Mary would get into an accident and ruin her new car. Jane is a secret hater.
A form of voyeurism in which the perpetrator masturbates and remains hidden whilst observing the fornication of others (e.g in a cupboard or under a bed). As the observed are reaching climax, the fapping phantom makes his presence known in a startling manner, ejaculating over the victims whilst cawing menacingly like a seagull.
Eoin: I was going down on Rebecca last night and Niall pulled a Secret Seagull on me!
Ryan: Oh shit what happened?
Eoin: I was about to scream at him to leave but before I could, a barrage of semen hit the back of my throat.
The amount of the penile shaft that is hidden by a fully grown out pubic bush.
Guy 1: “man, my dick is not looking too impressive today... I hope she thinks I’m big enough...”
Guy 2: “make sure you’re clean shaven! You’ll gain access to the secret inch!”
Guy 1: *shaves* “Woah! Now you can see all two inches!”