I can't lie there's not a story behind it, it just popped into my head, I doubt I would have planned on staying here initially so it was just a disposable username. I don't smoke weed, I tried it a few times at uni but just made me want to sleep.
I really don't know why it came into my head. I was always crap at picking usernames, nowadays I'd pick something more relavant.
It partly comes from the days of playing Wolfenstein etpro where players would use disposable names everytime then came into server.