urbandictionary.com
jib
Verb. To jib. Jibbing. The act of manuvering a bicycle, skateboard, snowboard or skis in tricky manner on top of and around a structure such as a stump, rocks, stairs, railigs, rooftops, etc. When you are playing around, showing off, jumping, flipping, hopping, etc you are jibbing.
Biker: Lets go jib on the steps at the library.
Skier: We were jibbin' all over the terrain park saturday.
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jib
Slang for Crystal Meth
Dude, You wanna go smoke some Jib?