To Blazai' is to smoke weed in a very elegent or sheek manor. Not just inahling and exhaling like a douche, taking your time with the spliff, doing hoops, irish waterfall or dragon smoke.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.