I forget the name of the best drink I have ever gotten at Starbucks!?

So I went into starbucks and asked for a drink that would wake me up really fast so the barista's talked it over and they agreed on this really old school drink that no one really knows about. I think it was a mixed mocha i dunno :/ on the cup it had written MMM all i know is that it had chocolate in it and that is was amazingggg! PLEeeEEe help !