1) Usually seen around social networking sites such as Friendster and Multiply, jejemons are individuals with low IQs who spread around their idiocy on the web by tYpFing LyK diZS jejejeje, making all people viewing their profile raise their eyebrows out of annoyance. Normal people like you and me must take a Bachelor of Arts in Jejetyping in order to understand said individuals, as deciphering their text would cause a lot of frustration and hair pulling.
CAUTION: THESE INDIVIDUALS ARE BREEDING! THEY CAN BE SEEN WRECKING GRAMMATICAL HAVOC ON FACEBOOK TOO!
2) Jejemons are not just confined to trying-hard Filipino gangsters and emos. A Jejemon can also include a variety of Latino-Hispanic fags who enjoy typing "jejejejeje" in a wider context, much to the disdain of their opponents in an internet MMORPG game such as Ragnarok and DOTA.
3) Basically anyone with a low tolerance in correct punctuation, syntax and grammar. Jejemons are usually hated or hunted down by Jejebusters or the grammar nazi to eradicate their grammatical ways.
On AIM or YM:
miSzMaldiTahh111: EoW pFuOh!
miszMaldiTahh111: i LLyK tO knOw moR3 bOut u, PwfoH. crE 2 t3ll mE yur N@me? jejejejeje!
You: You are a jejemon! Don't talk to me, you uneducated retard!
A group of internet grammar vigilantes, typically Filipinos, dedicating their internet lives towards the eradication of jejetyping and jejemon existence. Having dangerous links to the grammar nazi, jejebusters enjoy humiliating a jejemon by posting his/her profile on a social networking site, while everyone on the internet laughs, causing unwarranted embarrassment towards the individual caught jejetyping.
Hey jejebusters! I caught another jejemon! LOL, so funny!