a person who has been caught masterbating in your bed, the person's last name must be noster.
guy 1: what the fuck are you doing? i can't believe ur jacking off in my bed!
noster: i am gay.
guy 1: no shit! i told you to stop nosterbating in my bed!
noster: actually, the definition of nosterbating includes doing it in your bed, so you are just re-afirming it.
guy 1: so stop jacking off, just because you are talking doesn't mean you can still masterbate in my bed!
noster: sorry, just let me finish.