jeje, (to indicate that one is surprised)
Many TV or radio programs have used and repeatedly discussed on this word, although I have not yet had a change to hear people practically use it in a real communication. Apparently this word is originated in a dialect, and used by a heroin in a on-going TV drama. If indeed that this expression becomes popular in the near future, it would prove nothing but the power of influence by the mass media.
I reacted to this word with a strange feeling, as ジェ is how people call my name in English...