The phrase "mean machine" refers to something that is very powerful, strong, or tough. It suggests that the object or person in question can perform exceptionally well and may seem intimidating due to their abilities or appearance. Full definition
Another set of CES newcomers, this duo is a pair of mean machines. (howtogeek.com)
Using grounds doesn't mean the machine will be difficult to use, although there is a slight learning curve and a little more cleanup. (geekwrapped.com)
Two controllers come in the box, which means the machine is immediately ready for some multiplayer gaming. (techradar.com)