A crush obtained on one of your chat buddies on gchat. This is most likely a person you have not had much contact with in real life but get to know online only. Online conversations with a chat crush can lead to cross chat crushing on email, facebook , or twitter as well.
Girl1: Oh my gah, have you talked to that Jerry guy lately?
Girl2: Umm, No way! I met this guy on Gchat and he is totally my new chat crush.