1.A computer geek whom is such a loser that he/she makes "letters" using numbers and symbols, in a futile attempt to make other friends by using their queer language.
2. One who is a part of the 31337. "1337"
3. One whom hacks into computers to steal data, usually useless data.
4.The original hackers that hate other want-to-be unsucessful loser people who want the title of H4kr.
That h4kr fuxd up my computer. -OR-
7h47 H4kr FUXD UP /\/\'/ C0/\/\pU73R.