Jeff K. is a fictional forum and chat user with a poor understanding of internet culture, who fancies himself a “l33t haX0r”. His writing style is intentionally filled with errors, CAPS, "1" instead of "!" (and a generally large number of "!"s), and the substitution of numbers for letters, a characteristic of the script kid and d00dz warez communities. He is known for his aggressive tone, often insulting his interlocutors and resorting to spamming comically exaggerated, frivolous threats.