to be in a state of happiness through the consumption of drugs, whether it be alcohol, weed, ecstasy, etc. It is called artificial happiness because you rely on a substance to make you happy, thus making it artificial, since it doesn't come naturally.
retail therapy is another form of artificial happiness in which you rely on shopping to cheer you up.
1. Yo, I'm feeling so emo right now, I'm going to pop a pill to be in a state of artificial happiness!!!!
(Ecstasy causes artificial happiness because the chemicals alters the brain to change your mood and make you feel a sudden sense of euphoria.)
2. Dude...weed is the road to artificial happiness!