A domain hack is an internet domain name that suggests a word, phrase or name when concatenating two of more adjacent levels of that domain.
Normally when people register a domain name for a site their first choice is to look at .com domains or perhaps ones from their country such as .ie for Ireland.
If I had done that, I’d have ended up with a web address of getitoffme.com or getitoffme.ie
However it can be really hard to find a good domain that’s still available, as most of the good and short names have already been registered. And so I looked at domain hacking.
The country of Montenegro controls the top-level domain of .me but allows people from all over the world to register .me domains for their web sites.
So I now have a nice short domain name for my site, and in theory I could develop all kinds of other weight-loss related sites just by adding other sub-domain on the front, such as run.itoff.me (if I ever take up running).