The * makes the word a sound. So to write creepy would be itself while *creepy* would be the sound. The sound is a grunt alluding to the movie Orange County. Jack Black uses it when his father tells him and others that they "Came together" the night before. He precedes with a intrigued yet slightly erotic grunt. I had to make a word for it to express it during AIM, or Instant Messages, over the Internet. I came up with *creepy*.
Mohamed- "Dude, I went over to Ken's house to help his mom with the move."
Archie- "*creepy* Did you guys do it?"
Mohamed- "No, but she gave me a noogie if that counts."