Originally from a polite gamer sign-off ("enjoy the game"), it got shortened over time and repurposed to mean "forget it" or "get lost" — often used to shut down an absurd item-trade offer or dismiss someone outright.
A suffix shortened from "-grade student" — used as "yu-ding" (kindergartner), "cho-ding" (elementary schooler), "jung-ding" (middle schooler), "go-ding" (high schooler), "dae-ding" (college student), "jik-ding" (office worker). As youth crime has risen, harsher, more contemptuous versions aimed at middle/high schoolers have become more common than the plain forms.
It is used to mean the best of the best by adding the Chinese character 'Wang' (王) to the English word 'King' and adding 'Jjang' (meaning best). It was discovered during the 'Finding Idiot IDs' event on the DC Inside World of Warcraft (WOW) Gallery and was soon selected by the gallery members as the 'most powerful ID'.
Slang for someone forced to beg or perform on the street, exploited by someone else who takes their earnings; also used more loosely for any grueling, low-paid hustle.
"Reactionary diehard" (shortened from a term for stubbornly clinging to old customs) — typically used by left-leaning users to insult right-leaning ones.
"Playing League of Legends with your mouth," meaning someone who talks a big game but doesn't back it up with actual skill.