2) A conversation filler, also in IMing, when no one has said anything in a while.
*with any of these there can be added letters as well as semi colons. It is usually a personal preference.
Person 2: whats wrong?
Person 1: i have so much homework and my mom is bugging me about my grades.
2) *After 10 minutes*
Person 1: asdfghjkl
Person 1: so whats up?
Person 2: nm u?