Statistician as a slang word can be positive or negative depending on the situation, or upon the use in a given situation.
1. An expert in the creation of Facebook statuses, or someone who posts statuses way to frequently and of nothing important.
2. Someone who verbalizes statistics acting to be a know-it-all, or someone who is actually very knowledgeable.
1. "Wow man your Facebook statuses are the best, your like a statistician or something!"
2. "I never knew you were so smart dude, what are you a statistician or something?!
Negative uses of the above:
1. "What are you some kind of statistician, what's with all your Facebook posts?!"
2. "All right I get the picture, what are you a f*cking statistician?!"