another word for marijuana, usually used in code. most likely used in a public setting or at work, or any place where it would be inappropriate to speak of smoking marijuana. Hulan also stems from the idea that when one smokes pot they become asian-eyed, and it may be percieved as sounding like an asian word.
Have you seen hulan?
lets go (to) hulan after work.
Can you get me to/(some) hulan?