[Über] German for "super" or "hyper"; often used in video games […]

[Übern00b] (from German 'Über', super-/hyper- and a corruption of newb) "Fat […]

[-x0r] A suffix used by [H4X0Rs] to emphasize a point.

[0day] Software or media that is illegally obtained before or on […]

[404] Someone who is clueless. From the Web error message, "404 […]

[Acapulco gold] {n.}, {slang} Marijuana of an exceptionally high quality. * […]

[acid head] {n.}, {slang} A regular user of LSD on whom […]

[acid rock] {n.}, {slang} A characteristic kind of rock in which […]

[ACK] "acknowledged"; used frequently in discussion boards, tech-speak

[acoustic perfume] {n.}, {slang} Sound for covering up unwanted noise, such […]