Used with masters of any profession. Teachers, scholars, etc. Can be added to the end of a name (usually the surname), or simply 'sensei' in replacement of any name at all. Not to be confused with someone who is of higher status than you in the school or workplace (-sempai).
Saitou-sensei, kono tegami o Eigo ni yakushite itadakitai desu. (Teacher/master, I would like you to translate this letter into English for me.
A weed aficionado in the highest sense. A Zen-master of herb. King of the Smoke Session. Someone who knows their bud. Someone I'd like to befriend. The term is somewhat loosely applied to range from your uber-dealer/homegrower to borderline burnout old-soul pot smokers with insight and refined taste developed through years sampling the good shit.