Tracky dacks are tracksuit pants. Well, at least they are for Australians. Tracky dacks are about being relaxed, comfortable, and informal.
I’d like to claim that I chose this domain name because I wanted to make a website that reflected all of those qualities. A place you could visit to have some low-pressure relaxation. Of course the actual story is “I thought it was a funny domain name and there was a sale on at Hover.”