What does bah mean?

I can't even remember how I came up with bah! (sigh) You know how people often say the memory part always starts to fade once you hit 30, and wrinkles on your face do the opposite. Well...bah! in my world stands for baked at home and I totally love it, I think it sounds rather cute and tells everyone what I have to offer. Something scrumptious being freshly baked at home. I was googling the other night making sure "bah" doesn't mean anything too weird; and I found http://bah.org/ the BIG ASS HAM and I laughed so hard...Please don't get my bah! mixed up with Mr. Giant Can of Spam! I really appreciate his sense of humor. (lol) Thanx.