Janky is a very common club word used to describe someone who is high on crystal meth (Tina). Also know as "tweakin'." It is usually used to describe a shadyuser, or dealer.
"Carl is so janky. He once spent 3 hours cleaning his bath tub."
"That restaurant is so janky, you have to get reservations 6 months in advance" - guy
"This car is a little too janky for my tastes, how are you affording this?" - guy2