Cross between Mufasa, which is an extremely smokin' hot man, and Simba, which is an extremely cute boy. So basically, it's someone who is in the middle of cute and hot, and that awkward stage between a boy and a man.
Lindsie: Did you see that guy? I can't tell if he's just cute or smokin'...
Kristin: Dude, he's so a Simfasa!