Weeeellllll, because I'm really buff and didn't want to appear conceited ....just look at my avatar!
LOL
actually I'm not fat, wellll, not at the time anyway lol, when my Grand daughter was a little sh!t I slowed down working and spent more time with the family, I had put on a little roll around the mid section and one day she said "Grandpa how come your getting fat"....
I said "thanks, now everyone will call me fat".. then threw her out of my house and banned her for life,
A few weeks later I was at her home, her being banned from mine and all, she introduced me to some of her little friends and said "Thats my Grandma XXXX, and that's my Grandpa, you can just call him fatdan 'cause he is getting fat"...
The 3 little princesses all said "HI Grandpa fatdan", and they all went about their business...
I also used to own a piece of a bar called "Fat Harry's", and another called "Fatboys", the major shareholder named it even though no one was either fat, boys, or named Harry....
Around that same time I registered here in 2008, and fatdan was the 1st thing that came to mind! My grand daughter is now about to turn 14 in 3 days, and still banned from this home!