1. the nausea commonly experienced by narcotics users after the drug begins to wear off.
2. withdrawals caused by using narcotics, similar to the symptoms of the flu.
+ I'm junk sick from all the percocet I railed last night.
+ I feel all shaky and horrible, like I'm gonna puke. I must be junk sick again.
+ you must be sick from all that junk you've been shooting.