(n.) A computer dedicated to surfing the web or playing browser games such as Farmville.
A computer can start out as a Surf Machine (ex. your mother buys a crapware desktop from Walmart for 300 bucks) or can become one (ex. your desktop's hardware starts failing).
Typically cannot play any sort of real games or run any programs such as movie editors.
My dad wanted a new computer, so I just got him a Surf machine. All he does is watch porn and play farmville anyways.