Someone who often consumes jib, or meth, and is a fiend and steals peoples' shit for money, so they can afford more jib.
1) Blucka damn, that's one hell of a jibtek
2) D'yamn what a jibtek, he just railed 20 points of shard and did 3 BnE's
3) "Have a sketchy sunday... I'm...a jibtek"; spoken by an self-proclaimed jibtek the morning after a 'rave'.