A type of sexuality. It refers to being attracted to Leonardo DiCaprio in a sexual manner. It is exception sexuality- only people with a sexuality in which Leo would NOT be a normal potential mate can be DiCapriosexuals (thus, only straight males or gay females).
John: Dude, no homo, but I'd totally have sex with Leonardo DiCaprio.
Steve: It's not homo, man. You're just a DiCapriosexual.
Leonardo DiCaprio syndrome means that you’re only attracted to the guys called Leonardo Wilhelm Dicaprio because he’s the freaking most perfect human ever and that’s it.