An extremely ecstatic/happy/attractive/social description for a person. Someone who is extremely happy, has a lot of friends, is very attractive, or just enjoyable to be around
Man, that guy is so damn excited, she's like Shelbi Mullen excited!
Holy crap that girl is HOT, she's freaking Shelbi Mullen hot!
Hey, I like your friend, she's very Shelbi Mullen-like