A sig also know as signature. It is after all my post. If you notice most people after they post they have the samething at the bottom of the post. this way you don't have to re-type it all the time it just shows up.
That being known, you said "you need to get you another bike soon" I replied by saying "see sig" In my "sig" it says 05 gixxer 1000 (soon). Kinda like saying that is my plan.