Signature

[Sarah]

An outward mark by which internal characteristics were supposedto be indicated.Some plants bear a very evident signature of their nature and use.Dr. H. More.

[Sarah]

When someone writes his/her own name in cursive, usually illegible.

[Sarah]

It is the new, hip way of describing something that is totally cool and unique. Another variant could be signacha.

[Sarah]

a small banner-shaped picture that is used to display ones name on an online fourm. Usually made with photoshop, many of these are rather impressive.

[Sarah]

After flushing down a #2, the culprit leaves behind only a piece of poo stained toilet paper.

[Sarah]

dem tings you scribble at the end of the page to let the damn world know who the fuck you are

[Dianne]

User-defined message which is attached to all of said users posts. [Signatures] come in these types:

Flashy [show-off] signature with a HUGE image in it. These are hardly ever done by the user carrying it. It is usually accompanied with some lame anime character no one cares about. They all look the same, because they probably all followed the same dang [tutorial].
Animation hell. This guy loves animated GIFs, and it shows. Not funny, and your computer will start your second fan. I hope you have a content [blocker] handy.
Proud users. These are the idiots with 10 something user banners in their [signatures]. They also have a huge GET FIREFOX (or die) button.
The no one cares but me signature. These guys have a huge Im listening to: thing. Most of the time, theyre listening to some [new punk]/emo band that you probably hate. They also include random facts about themselves, as if someone cared. These are combined with Flashy or Proud signature types for a [double suck] attack.
General [GameFAQs users] signature. These have anime quotes from Naruto, Sailor Moon n the rest of that crap. No doubt it will have a nice fad included with it, such as Fox for sex or I wont change this until.... Sometimes they include a quote everybody has heard before, in a sad attempt at looking somewhat intelligent. Bland quotes from other GameFAQs users appear at times.
The useful signature. I cannot comment on these since no one has ever spotted one. Maybe you can be the first. No wait, better yet, dont have a signature at all.

[Kai]

A persons name written in a distinctive way as a form of identification in authorizing a check or document or concluding a letter.

[Couch Potatoe]

Anything below a post on a [forum] to show an idea, place or thing. Can be showen in [a picture], antimation, or [Photoshoped] picture.

[Merna]

Cloud-based travel management software that helps Tour Operator and DMC companies solve business challenges. A software product by Sriggle Tech

[Monty]

your name written by yourself, always in the same way, usually to show that something has been written or agreed by you