Imma go ahead and call poop on that fact, maybe hardcore addict. 9-10% of people who participate in the injecting of 420's get addicted. Not a big number to make some picture sayings its fact you will die early. Not saying it isn't possible though.
"oh My" could be interpreted as the beginning for a statement of "Oh, my job is hard." or "oh my wife left be for a man who I hated from the moment I met him."