تعريف domain hack في الإنجليزية الإنجليزية القاموس.
An Internet domain name in which the TLD (such as a country code) can be understood as part of the name rather than the usual suffix
I love those domain hacks, I own http://www.web2.0button.com and I recently got an email asking how I registered a domain name with a dot in it (HEHE).